PART II CRITIQUE OF THE TELEOLOGICAL JUDGEMENT

§ 61. Of the objective purposiveness of Nature

We have on transcendental principles good ground to assume a subjective purposiveness in nature, in its particular laws, in reference to its comprehensibility by human Judgement and to the possibility of the connexion of particular experiences in a system. This may be expected as possible in many products of nature, which, as if they were devised quite specially for our Judgement, contain a specific form conformable thereto; which through their manifoldness and unity serve at once to strengthen and to sustain the mental powers (that come into play in the employment of this faculty); and to which therefore we give the name of beautiful forms.

But that the things of nature serve one another as means to purposes, and that their possibility is only completely intelligible through this kind of causality—for this we have absolutely no ground in the universal Idea of nature, as the complex of the objects of sense. In the above-mentioned case, the representation of things, because it is something in ourselves, can be quite well thought a priori as suitable and useful for the internally purposive determination of our cognitive faculties; but that purposes, which neither are our own nor belong to nature (for we do not regard nature as an intelligent being), could or should constitute a particular kind of causality, at least a quite special conformity to law,—this we have absolutely no a priori reason for presuming. Yet more, experience itself cannot prove to us the actuality of this; there must then have preceded a rationalising subtlety which only sportively introduces the concept of purpose into the nature of things, but which does not derive it from Objects or from their empirical cognition. To this latter it is of more service to make nature comprehensible according to analogy with the subjective ground of the connexion of our representations, than to cognise it from objective grounds.

Further, objective purposiveness, as a principle of the possibility of things of nature, is so far removed from necessary connexion with the concept of nature, that it is much oftener precisely that upon which one relies to prove the contingency of nature and of its form. When, e.g. we adduce the structure of a bird, the hollowness of its bones, the disposition of its wings for motion and of its tail for steering, etc., we say that all this is contingent in the highest degree according to the mere nexus effectivus of nature, without calling in the aid of a particular kind of causality, namely that of purpose (nexus finalis). In other words, nature, considered as mere mechanism, could have produced its forms in a thousand other ways without stumbling upon the unity which is in accordance with such a principle. It is not in the concept of nature but quite apart from it that we can hope to find the least ground a priori for this.

Nevertheless the teleological act of judgement is rightly brought to bear, at least problematically, upon the investigation of nature; but only in order to bring it under principles of observation and inquiry according to the analogy with the causality of purpose, without any pretence to explain it thereby. It belongs therefore to the reflective and not to the determinant judgement. The concept of combinations and forms of nature in accordance with purposes is then at least one principle more for bringing its phenomena under rules where the laws of simply mechanical causality do not suffice. For we bring in a teleological ground, where we attribute causality in respect of an Object to the concept of an Object, as if it were to be found in nature (not in ourselves); or rather when we represent to ourselves the possibility of the Object after the analogy of that causality which we experience in ourselves, and consequently think nature technically as through a special faculty. If we did not ascribe to it such a method of action, its causality would have to be represented as blind mechanism. If, on the contrary, we supply to nature causes acting designedly, and consequently place at its basis teleology, not merely as a regulative principle for the mere judging of phenomena, to which nature can be thought as subject in its particular laws, but as a constitutive principle of the derivation of its products from their causes; then would the concept of a natural purpose no longer belong to the reflective but to the determinant Judgement. Then, in fact, it would not belong specially to the Judgement (like the concept of beauty regarded as formal subjective purposiveness), but as a rational concept it would introduce into natural science a new causality, which we only borrow from ourselves and ascribe to other beings, without meaning to assume them to be of the same kind with ourselves.

FIRST DIVISION ANALYTIC OF THE TELEOLOGICAL JUDGEMENT

§ 62. Of the objective purposiveness which is merely formal as distinguished from that which is material

All geometrical figures drawn on a principle display a manifold, oft admired, objective purposiveness; i.e. in reference to their usefulness for the solution of several problems by a single principle, or of the same problem in an infinite variety of ways. The purposiveness is here obviously objective and intellectual, not merely subjective and aesthetical. For it expresses the suitability of the figure for the production of many intended figures, and is cognised through Reason. But this purposiveness does not make the concept of the object itself possible, i.e. it is not regarded as possible merely with reference to this use.

In so simple a figure as the circle lies the key to the solution of a multitude of problems, each of which would demand various appliances; whereas the solution results of itself, as it were, as one of the infinite number of elegant properties of this figure. Are we, for example, asked to construct a triangle, being given the base and vertical angle? The problem is indeterminate, i.e. it can be solved in an infinite number of ways. But the circle embraces them altogether as the geometrical locus of the vertices of triangles satisfying the given conditions. Again, suppose that two lines are to cut one another so that the rectangle under the segments of the one should be equal to the rectangle under the segments of the other; the solution of the problem from this point of view presents much difficulty. But all chords intersecting inside a circle divide one another in this proportion. Other curved lines suggest other purposive solutions of which nothing was thought in the rule that furnished their construction. All conic sections in themselves and when compared with one another are fruitful in principles for the solution of a number of possible problems, however simple is the definition which determines their concept.—It is a true joy to see the zeal with which the old geometers investigated the properties of lines of this class, without allowing themselves to be led astray by the questions of narrow-minded persons, as to what use this knowledge would be. Thus they worked out the properties of the parabola without knowing the law of gravitation, which would have suggested to them its application to the trajectory of heavy bodies (for the motion of a heavy body can be seen to be parallel to the curve of a parabola). Again, they found out the properties of an ellipse without surmising that any of the heavenly bodies had weight, and without knowing the law of force at different distances from the point of attraction, which causes it to describe this curve in free motion. While they thus unconsciously worked for the science of the future, they delighted themselves with a purposiveness in the [essential] being of things which yet they were able to present completely a priori in its necessity. Plato, himself master of this science, hinted at such an original constitution of things in the discovery of which we can dispense with all experience, and at the power of the mind to produce from its supersensible principle the harmony of beings (where the properties of number come in, with which the mind plays in music). This [he touches upon] in the inspiration that raised him above the concepts of experience to Ideas, which seem to him to be explicable only through an intellectual affinity with the origin of all beings. No wonder that he banished from his school the man who was ignorant of geometry, since he thought he could derive from pure intuition, which has its home in the human spirit, that which Anaxagoras drew from empirical objects and their purposive combination. For in the very necessity of that which is purposive, and is constituted just as if it were designedly intended for our use,—but at the same time seems to belong originally to the being of things without any reference to our use—lies the ground of our great admiration of nature, and that not so much external as in our own Reason. It is surely excusable that this admiration should through misunderstanding gradually rise to the height of fanaticism.

But this intellectual purposiveness, although no doubt objective (not subjective like aesthetical purposiveness), is in reference to its possibility merely formal (not real). It can only be conceived as purposiveness in general without any [definite] purpose being assumed as its basis, and consequently without teleology being needed for it. The figure of a circle is an intuition which is determined by means of the Understanding according to a principle. The unity of this principle which I arbitrarily assume and use as fundamental concept, applied to a form of intuition (space) which is met with in myself as a representation and yet a priori, renders intelligible the unity of many rules resulting from the construction of that concept, which are purposive for many possible designs. But this purposiveness does not imply a purpose or any other ground whatever. It is quite different if I meet with order and regularity in complexes of things, external to myself, enclosed within certain boundaries; as, e.g. in a garden, the order and regularity of the trees, flower-beds, and walks. These I cannot expect to derive a priori from my bounding of space made after a rule of my own; for this order and regularity are existing things which must be given empirically in order to be known, and not a mere representation in myself determined a priori according to a principle. So then the latter (empirical) purposiveness, as real, is dependent on the concept of a purpose.

But the ground of admiration for a perceived purposiveness, although it be in the being of things (so far as their concepts can be constructed), may very well be seen, and seen to be legitimate. The manifold rules whose unity (derived from a principle) excites admiration, are all synthetical and do not follow from the concept of the Object, e.g. of a circle; but require this Object to be given in intuition. Hence this unity gets the appearance of having empirically an external basis of rules distinct from our representative faculty; as if therefore the correspondence of the Object to that need of rules which is proper to the Understanding were contingent in itself, and therefore only possible by means of a purpose expressly directed thereto. Now because this harmony, notwithstanding all this purposiveness, is not cognised empirically but a priori, it should bring us of itself to this point—that space, through whose determination (by means of the Imagination, in accordance with a concept) the Object is alone possible, is not a characteristic of things external to me, but a mere mode of representation in myself. Hence, in the figure which I draw in conformity with a concept, i.e. in my own mode of representing that which is given to me externally, whatever it may be in itself, it is I that introduce the purposiveness; I get no empirical instruction from the Object about the purposiveness, and so I require in it no particular purpose external to myself. But because this consideration already calls for a critical employment of Reason, and consequently cannot be involved in the judging of the Object according to its properties; so this latter [judging] suggests to me immediately nothing but the unification of heterogeneous rules (even according to their very diversity) in a principle. This principle, without requiring any particular a priori basis external to my concept, or indeed, generally speaking, to my representation, is yet cognised a priori by me as true. Now wonder is a shock of the mind arising from the incompatibility of a representation, and the rule given by its means, with the principles already lying at its basis; which provokes a doubt as to whether we have rightly seen or rightly judged. Admiration, however, is wonder which ever recurs, despite the disappearance of this doubt. Consequently the latter is a quite natural effect of that observed purposiveness in the being of things (as phenomena). It cannot indeed be censured, whilst the unification of the form of sensible intuition (space)—with the faculty of concepts (the Understanding)—is inexplicable to us; and that not only on account of the union being just of the kind that it is, but because it is enlarging for the mind to surmise [the existence of] something lying outside our sensible representations in which, although unknown to us, the ultimate ground of that agreement may be met with. We are, it is true, not necessitated to cognise this if we have only to do a priori with the formal purposiveness of our representations; but the fact that we are compelled to look out beyond it inspires at the same time an admiration for the object that impels us thereto.

We are accustomed to speak of the above-mentioned properties of geometrical figures or of numbers as beautiful, on account of a certain a priori purposiveness they have for all kinds of cognitive uses, this purposiveness being quite unexpected on account of the simplicity of the construction. We speak, e.g. of this or that beautiful property of the circle, which was discovered in this or that way. But there is no aesthetical act of judgement through which we find it purposive, no act of judgement without a concept which renders noticeable a mere subjective purposiveness in the free play of our cognitive faculties; but an intellectual act according to concepts which enables us clearly to cognise an objective purposiveness, i.e. availableness for all kinds of (infinitely manifold) purposes. We must rather call this relative perfection than a beauty of the mathematical figure. To speak thus of an intellectual beauty cannot in general be permissible; for otherwise the word beauty would lose all determinate significance, or the intellectual satisfaction all superiority over the sensible. We should rather call a demonstration of such properties beautiful, because through it the Understanding as the faculty of concepts, and the Imagination as the faculty of presenting them, feel themselves strengthened a priori. (This, when viewed in connexion with the precision introduced by Reason, is spoken of as elegant.) Here, however, the satisfaction, although it is based on concepts, is subjective; while perfection brings with itself an objective satisfaction.

§ 63. Of the relative, as distinguished from the inner, purposiveness of nature

Experience leads our Judgement to the concept of an objective and material purposiveness, i.e. to the concept of a purpose of nature, only when105 we have to judge of a relation of cause to effect which we find ourselves able to apprehend as legitimate only by presupposing the Idea of the effect of the causality of the cause as the fundamental condition, in the cause, of the possibility of the effect. This can take place in two ways. We may regard the effect directly as an art product, or only as material for the art of other possible natural beings; in other words, either as a purpose or as a means towards the purposive employment of other causes. This latter purposiveness is called utility (for man) or mere advantage (for other creatures), and is merely relative; while the former is an inner purposiveness of the natural being.

For example, rivers bring down with them all kinds of earth serviceable for the growth of plants which sometimes is deposited inland, often also at their mouths. The tide brings this mud to many coasts over the land or deposits it on the shore; and so, more especially if men give their aid so that the ebb shall not carry it back again, the fruit-bearing land increases in area, and the vegetable kingdom gains the place which formerly was the habitation of fish and shells. In this way has nature itself brought about most of the extensions of the land, and still continues to do so, although very slowly.—Now the question is whether this is to be judged a purpose of nature, because it contains utility for men. We cannot put it down to the account of the vegetable kingdom, because just as much is subtracted from sea-life as is added to land-life.

Or, to give an example of the advantageousness of certain natural things as means for other creatures (if we suppose them to be means), no soil is more suitable to pine trees than a sandy soil. Now the deep sea, before it withdrew from the land, left behind large tracts of sand in our northern regions, so that on this soil, so unfavourable for all cultivation, widely extended pine forests were enabled to grow, for the unreasoning destruction of which we frequently blame our ancestors. We may ask if this original deposit of tracts of sand was a purpose of nature for the benefit of the possible pine forests? So much is clear, that if we regard this as a purpose of nature, we must also regard the sand as a relative purpose, in reference to which the ocean strand and its withdrawal were means: for in the series of the mutually subordinated members of a purposive combination, every member must be regarded as a purpose (though not as a final purpose), to which its proximate cause is the means. So too if cattle, sheep, horses, etc., are to exist, there must be grass on the earth, but there must also be saline plants in the desert if camels are to thrive; and again these and other herbivorous animals must be met with in numbers if there are to be wolves, tigers, and lions. Consequently the objective purposiveness, which is based upon advantage, is not an objective purposiveness of things in themselves; as if the sand could not be conceived for itself as an effect of a cause, viz. the sea, without attributing to the latter a purpose, and regarding the effect, namely, the sand, as a work of art. It is a merely relative purposiveness contingent upon the thing to which it is ascribed; and although in the examples we have cited, the different kinds of grass are to be judged as in themselves organised products of nature, and consequently as artificial, yet are they to be regarded, in reference to the beasts which feed upon them, as mere raw material.

But above all, though man, through the freedom of his causality, finds certain natural things of advantage for his designs—designs often foolish, such as using the variegated plumage of birds to adorn his clothes, or coloured earths and the juices of plants for painting his face; often again reasonable as when the horse is used for riding, the ox or (as in Minorca) the ass or pig for ploughing—yet we cannot even here assume a relative natural purpose. For his Reason knows how to give things a conformity with his own arbitrary fancies for which he was not at all predestined by nature. Only, if we assume that men are to live upon the earth, then the means must be there without which they could not exist as animals, and even as rational animals (in however low a degree of rationality); and thereupon those natural things, which are indispensable in this regard, must be considered as natural purposes.

We can hence easily see that external purposiveness (advantage of one thing in respect of others) can be regarded as an external natural purpose only under the condition, that the existence of that [being], to which it is immediately or distantly advantageous, is in itself a purpose of nature. Since that can never be completely determined by mere contemplation of nature, it follows that relative purposiveness, although it hypothetically gives indications of natural purposes, yet justifies no absolute teleological judgement.

Snow in cold countries protects the crops from the frost; it makes human intercourse easier (by means of sleighs). The Laplander finds in his country animals by whose aid this intercourse is brought about, i.e. reindeer, who find sufficient sustenance in a dry moss which they have to scratch out for themselves from under the snow, and who are easily tamed and readily permit themselves to be deprived of that freedom in which they could have remained if they chose. For other people in the same frozen regions marine animals afford rich stores; in addition to the food and clothing which are thus supplied, and the wood which is floated in by the sea to their dwellings, these marine animals provide material for fuel by which their huts are warmed. Here is a wonderful concurrence of many references of nature to one purpose; and all this applies to the cases of the Greenlander, the Lapp, the Samoyede, the inhabitant of Yakutsk, etc. But then we do not see why, generally, men must live there at all. Therefore to say that vapour falls out of the atmosphere in the form of snow, that the sea has its currents which float down wood that has grown in warmer lands, and that there are in it great sea monsters filled with oil, because the idea of advantage for certain poor creatures is fundamental for the cause which collects all these natural products, would be a very venturesome and arbitrary judgement. For even if there were none of this natural utility, we should miss nothing as regards the adequateness of natural causes to nature’s constitution; much more even to desire such a tendency in, and to attribute such a purpose to, nature would be the part of a presumptuous and inconsiderate fancy. For indeed it might be observed that it could only have been the greatest unsociability among men which thus scattered them into such inhospitable regions.

§ 64. Of the peculiar character of things as natural purposes

In order to see that a thing is only possible as a purpose, that is, to be forced to seek the causality of its origin not in the mechanism of nature but in a cause whose faculty of action is determined through concepts, it is requisite that its form be not possible according to mere natural laws, i.e. laws which can be cognised by us through the Understanding alone when applied to objects of Sense; but that even the empirical knowledge of it as regards its cause and effect presupposes concepts of Reason. This contingency of its form in all empirical natural laws in reference to Reason affords a ground for regarding its causality as possible only through Reason. For Reason, which must cognise the necessity of every form of a natural product in order to comprehend even the conditions of its genesis, cannot assume such [natural] necessity in that particular given form. The causality of its origin is then referred to the faculty of acting in accordance with purposes (a will); and the Object which can only thus be represented as possible is represented as a purpose.

If in a seemingly uninhabited country a man perceived a geometrical figure, say a regular hexagon, inscribed on the sand, his reflection busied with such a concept would attribute, although obscurely, the unity in the principle of its genesis to Reason, and consequently would not regard as a ground of the possibility of such a shape the sand, or the neighbouring sea, or the winds, or beasts with familiar footprints, or any other irrational cause. For the chance against meeting with such a concept, which is only possible through Reason, would seem so infinitely great, that it would be just as if there were no natural law, no cause in the mere mechanical working of nature capable of producing it; but as if only the concept of such an Object, as a concept which Reason alone can supply and with which it can compare the thing, could contain the causality for such an effect. This then would be regarded as a purpose, but as a product of art, not as a natural purpose (vestigium hominis video).106

But in order to regard a thing cognised as a natural product as a purpose also—consequently as a natural purpose, if this is not a contradiction—something more is required. I would say provisionally: a thing exists as a natural purpose, if it is [although in a double sense]107 both cause and effect of itself. For herein lies a causality the like of which cannot be combined with the mere concept of a nature without attributing to it a purpose; it can certainly be thought without contradiction, but cannot be comprehended. We shall elucidate the determination of this Idea of a natural purpose by an example, before we analyse it completely.

In the first place, a tree generates another tree according to a known natural law. But the tree produced is of the same genus; and so it produces itself generically. On the one hand, as effect it is continually self-produced; on the other hand, as cause it continually produces itself, and so perpetuates itself generically.

Secondly, a tree produces itself as an individual. This kind of effect no doubt we call growth; but it is quite different from any increase according to mechanical laws, and is to be reckoned as generation, though under another name. The matter that the tree incorporates it previously works up into a specifically peculiar quality, which natural mechanism external to it cannot supply; and thus it develops itself by aid of a material which, as compounded, is its own product. No doubt, as regards the constituents got from nature without, it must only be regarded as an educt; but yet in the separation and recombination of this raw material we see such an originality in the separating and formative faculty of this kind of natural being, as is infinitely beyond the reach of art, if the attempt is made to reconstruct such vegetable products out of elements obtained by their dissection or material supplied by nature for their sustenance.

Thirdly, each part of a tree generates itself in such a way that the maintenance of any one part depends reciprocally on the maintenance of the rest. A bud of one tree engrafted on the twig of another produces in the alien stock a plant of its own kind, and so also a scion engrafted on a foreign stem. Hence we may regard each twig or leaf of the same tree as merely engrafted or inoculated into it, and so as an independent tree attached to another and parasitically nourished by it. At the same time, while the leaves are products of the tree they also in turn give support to it; for the repeated defoliation of a tree kills it, and its growth thus depends on the action of the leaves upon the stem. The self-help of nature in case of injury in the vegetable creation, when the want of a part that is necessary for the maintenance of its neighbours is supplied by the remaining parts; and the abortions or malformations in growth, in which certain parts, on account of casual defects or hindrances, form themselves in a new way to maintain what exists, and so produce an anomalous creature, I shall only mention in passing, though they are among the most wonderful properties of organised creatures.

§ 65. Things regarded as natural purposes are organised beings

According to the character alleged in the preceding section, a thing, which, though a natural product, is to be cognised as only possible as a natural purpose, must bear itself alternately as cause and as effect. This, however, is a somewhat inexact and indeterminate expression which needs derivation from a determinate concept.

Causal combination as thought merely by the Understanding is a connexion constituting an ever-progressive series (of causes and effects); and things which as effects presuppose others as causes cannot be reciprocally at the same time causes of these. This sort of causal combination we call that of effective causes (nexus effectivus). But on the other hand, a causal combination according to a concept of Reason (of purposes) can also be thought, which regarded as a series would lead either forwards or backwards; in this the thing that has been called the effect may with equal propriety be termed the cause of that of which it is the effect. In the practical department of human art we easily find connexions such as this; e.g. a house, no doubt, is the cause of the money received for rent, but also conversely the representation of this possible income was the cause of building the house. Such a causal connexion we call that of final causes (nexus finalis). We may perhaps suitably name the first the connexion of real causes, the second of those which are ideal; because from this nomenclature it is at once comprehended that there can be no more than these two kinds of causality.

For a thing to be a natural purpose in the first place it is requisite that its parts (as regards their being and their form) are only possible through their reference to the whole. For the thing itself is a purpose and so is comprehended under a concept or an Idea which must determine a priori all that is to be contained in it. But so far as a thing is only thought as possible in this way, it is a mere work of art; i.e. a product of one rational cause distinct from the matter (of the parts), whose causality (in the collection and combination of the parts) is determined through its Idea of a whole possible by their means (and consequently not through external nature).

But if a thing as a natural product is to involve in itself and in its internal possibility a reference to purposes,—i.e. to be possible only as a natural purpose, and without the causality of the concepts of rational beings external to itself,—then it is requisite secondly that its parts should so combine in the unity of a whole that they are reciprocally cause and effect of each other’s form. Only in this way can the Idea of the whole conversely (reciprocally) determine the form and combination of all the parts; not indeed as cause—for then it would be an artificial product—but as the ground of cognition, for him who is judging it, of the systematic unity and combination of all the manifold contained in the given material.

For a body then which is to be judged in itself and its internal possibility as a natural purpose, it is requisite that its parts mutually depend upon each other both as to their form and their combination, and so produce a whole by their own causality; while conversely the concept of the whole may be regarded as its cause according to a principle (in a being possessing a causality according to concepts adequate to such a product). In this case then the connexion of effective causes may be judged as an effect through final causes.

In such a product of nature every part not only exists by means of the other parts, but is thought as existing for the sake of the others and the whole, that is as an (organic) instrument. Thus, however, it might be an artificial instrument, and so might be represented only as a purpose that is possible in general; but also its parts are all organs reciprocally producing each other. This can never be the case with artificial instruments, but only with nature which supplies all the material for instruments (even for those of art). Only a product of such a kind can be called a natural purpose, and this because it is an organised and self-organising being.

In a watch one part is the instrument for moving the other parts, but the wheel is not the effective cause of the production of the others; no doubt one part is for the sake of the others, but it does not exist by their means. In this case the producing cause of the parts and of their form is not contained in the nature (of the material), but is external to it in a being which can produce effects according to Ideas of a whole possible by means of its causality. Hence a watch wheel does not produce other wheels, still less does one watch produce other watches, utilising (organising) foreign material for that purpose; hence it does not replace of itself parts of which it has been deprived, nor does it make good what is lacking in a first formation by the addition of the missing parts, nor if it has gone out of order does it repair itself—all of which, on the contrary, we may expect from organised nature.—An organised being is then not a mere machine, for that has merely moving power, but it possesses in itself formative power of a self-propagating kind which it communicates to its materials though they have it not of themselves; it organises them, in fact, and this cannot be explained by the mere mechanical faculty of motion.

We say of nature and its faculty in organised products far too little if we describe it as an analogon of art; for this suggests an artificer (a rational being) external to it. Much rather does it organise itself and its organised products in every species, no doubt after one general pattern but yet with suitable deviations, which self-preservation demands according to circumstances. We perhaps approach nearer to this inscrutable property, if we describe it as an analogon of life; but then we must either endow matter, as mere matter, with a property which contradicts its very being (hylozoism), or associate therewith an alien principle standing in communion with it (a soul). But in the latter case we must, if such a product is to be a natural product, either presuppose organised matter as the instrument of that soul, which does not make the soul a whit more comprehensible; or regard the soul as artificer of this structure and so remove the product from (corporeal) nature. To speak strictly, then, the organisation of nature has in it nothing analogous to any causality we know.108 Beauty in nature can be rightly described as an analogon of art, because it is ascribed to objects only in reference to reflection upon their external aspect, and consequently only on account of the form of their external surface. But internal natural perfection, as it belongs to those things which are only possible as natural purposes, and are therefore called organised beings, is not analogous to any physical, i.e. natural, faculty known to us; nay even, regarding ourselves as, in the widest sense, belonging to nature, it is not even thinkable or explicable by means of any exactly fitting analogy to human art.

The concept of a thing as in itself a natural purpose is therefore no constitutive concept of Understanding or of Reason, but it can serve as a regulative concept for the reflective Judgement, to guide our investigation about objects of this kind by a distant analogy with our own causality according to purposes generally, and in our meditations upon their ultimate ground. This latter use, however, is not in reference to the knowledge of nature or of its original ground, but rather to our own practical faculty of Reason, in analogy with which we considered the cause of that purposiveness.

Organised beings are then the only beings in nature which, considered in themselves and apart from any relation to other things, can be thought as possible only as purposes of nature. Hence they first afford objective reality to the concept of a purpose of nature, as distinguished from a practical purpose; and so they give to the science of nature the basis for a teleology, i.e. a mode of judgement about natural Objects according to a special principle which otherwise we should in no way be justified in introducing (because we cannot see a priori the possibility of this kind of causality).

§ 66. Of the principle of judging of internal purposiveness in organised beings

This principle, which is at the same time a definition, is as follows: An organised product of nature is one in which every part is reciprocally purpose, [end] and means. In it nothing is vain, without purpose, or to be ascribed to a blind mechanism of nature.

This principle, as regards its occasion, is doubtless derived from experience, viz. from that methodised experience called observation; but on account of the universality and necessity which it ascribes to such purposiveness it cannot rest solely on empirical grounds, but must have at its basis an a priori principle, although it be merely regulative and these purposes lie only in the idea of the judging [subject] and not in an effective cause. We may therefore describe the aforesaid principle as a maxim for judging of the internal purposiveness of organised beings.

It is an acknowledged fact that the dissectors of plants and animals, in order to investigate their structure and to find out the reasons, why and for what end such parts, such a disposition and combination of parts, and just such an internal form have been given them, assume as indisputably necessary the maxim that nothing in such a creature is vain; just as they lay down as the fundamental proposition of the universal science of nature, that nothing happens by chance. In fact, they can as little free themselves from this teleological proposition as from the universal physical proposition; for as without the latter we should have no experience at all, so without the former we should have no guiding thread for the observation of a species of natural things which we have thought teleologically under the concept of natural purposes.

Now this concept brings the Reason into a quite different order of things from that of a mere mechanism of nature, which is no longer satisfying here. An Idea is to be the ground of the possibility of the natural product. But because this is an absolute unity of representation, instead of the material being a plurality of things that can supply by itself no definite unity of composition,—if that unity of the Idea is to serve at all as the a priori ground of determination of a natural law of the causality of such a form of composition,—the purpose of nature must be extended to everything included in its product. For if we once refer action of this sort on the whole to any supersensible ground of determination beyond the blind mechanism of nature, we must judge of it altogether according to this principle; and we have then no reason to regard the form of such a thing as partly dependent on mechanism—for by such mixing up of disparate principles no certain rule of judging would be left.

For example, it may be that in an animal body many parts can be conceived as concretions according to mere mechanical laws (as the hide, the bones, the hair). And yet the cause which brings together the required matter, modifies it, forms it, and puts it in its appropriate place, must always be judged of teleologically; so that here everything must be considered as organised, and everything again in a certain relation to the thing itself is an organ.

§ 67. Of the principle of the teleological judging of nature in general as a system of purposes

We have already said above that the external purposiveness of natural things affords no sufficient warrant for using them as purposes of nature in order to explain their presence, and for regarding their contingently purposive effects as the grounds of their presence according to the principle of final causes. Thus we cannot take for natural purposes, rivers because they promote intercourse among inland peoples, mountains because they contain the sources of the rivers and for their maintenance in rainless seasons have a store of snow, or the slope of the land which carries away the water and leaves the country dry; because although this shape of the earth’s surface be very necessary for the origin and maintenance of the vegetable and animal kingdoms, it has nothing in itself for the possibility of which we are forced to assume a causality according to purposes. The same is true of plants which man uses for his needs or his pleasures; of beasts, the camel, the ox, the horse, dog, etc., which are indispensable to him as well for food as because they are used in his service in many different ways. In the case of things which we have no reason for regarding in themselves as purposes, such external relation can only be hypothetically judged as purposive.

To judge of a thing as a natural purpose on account of its internal form is something very different from taking the existence of that thing to be a purpose of nature. For the latter assertion we require not merely the concept of a possible purpose, but the knowledge of the final purpose (scopus) of nature. But this requires a reference of such knowledge to something supersensible far transcending all our teleological knowledge of nature, for the purpose of [the existence of]109 nature must itself be sought beyond nature. The internal form of a mere blade of grass is sufficient to show that for our human faculty of judgement its origin is possible only according to the rule of purposes. But if we change our point of view and look to the use which other natural beings make of it, abandon the consideration of its internal organisation and only look to its externally purposive references, we shall arrive at no categorical purpose; all this purposive reference rests on an ever more distant condition, which, as unconditioned (the presence of a thing as final purpose), lies quite outside the physico-teleological view of the world. For example, grass is needful for the ox, which again is needful for man as a means of existence, but then we do not see why it is necessary that men should exist (a question this, which we shall not find so easy to answer if we sometimes cast our thoughts on the New Hollanders or the inhabitants of Tierra del Fuego). So conceived, the thing is not even a natural purpose, for neither it (nor its whole genus) is to be regarded as a natural product.

Hence it is only so far as matter is organised that it necessarily carries with it the concept of a natural purpose, because this its specific form is at the same time a product of nature. But this concept leads necessarily to the Idea of collective nature as a system in accordance with the rule of purposes, to which Idea all the mechanism of nature must be subordinated according to principles of Reason (at least in order to investigate natural phenomena therein). The principle of Reason belongs to it only as a subjective principle or a maxim: viz. everything in the World is some way good for something; nothing is vain in it. By the example that nature gives us in its organic products we are justified, nay called upon, to expect of it and of its laws nothing that is not purposive on the whole.

It is plain that this is not a principle for the determinant but only for the reflective Judgement; that it is regulative and not constitutive; and that we derive from it a clue by which we consider natural things in reference to an already given ground of determination according to a new law-abiding order; and extend our natural science according to a different principle, viz. that of final causes, but yet without prejudice to the principle of mechanical causality. Furthermore, it is in no wise thus decided, whether anything of which we judge by this principle, is a designed purpose of nature; whether the grass is for the ox or the sheep, or whether these and the other things of nature are here for men. It is well also from this side to consider the things which are unpleasant to us and are contrary to purpose in particular references. Thus, for example, we can say: The vermin that torment men in their clothes, their hair, or their beds, may be, according to a wise appointment of nature, a motive to cleanliness which is in itself an important means for the preservation of health. Or again the mosquitoes and other stinging insects that make the wildernesses of America so oppressive to the savages, may be so many goads to activity for these primitive men, [inducing them] to drain the marshes and bring light into the forests which intercept every breath of air, and in this way, as well as by cultivating the soil, to make their habitations more healthy. The same thing, which appears to men contradictory to nature in its inner organisation, if viewed in this light gives an entertaining, sometimes an instructive, outlook into a teleological order of things, to which, without such a principle, mere physical observation would not lead us by itself. Thus some persons regard the tapeworm as given to the men or animals in whom it resides, as a kind of set-off for some defect in their vital organs; now I would ask if dreams (without which we never sleep, though we seldom remember them) may not be a purposive ordinance of nature? For during the relaxation of all the moving powers of the body, they serve to excite internally the vital organs by the medium of the Imagination and its great activity (which in this state generally rises to the height of affection). During sleep the Imagination commonly is more actively at play when the stomach is overloaded, in which case this excitement is the more necessary. Consequently, then, without this internal power of motion and this fatiguing unrest, on account of which we complain about our dreams (though in fact they are rather remedial), sleep even in a sound state of health would be a complete extinction of life.

Also the beauty of nature, i.e. its connexion with the free play of our cognitive faculties in apprehending and judging of its appearance, can be regarded as a kind of objective purposiveness of nature in its whole [content] as a system of which man is a member; if once the teleological judging of the same by means of the natural purposes which organised beings suggest to us, has justified for us the Idea of a great system of purposes of nature. We can regard it as a favour110 which nature has felt for us, that in addition to what is useful it has so profusely dispensed beauty and charm; and we can therefore love it, as well as regard it with respect on account of its immensity, and feel ourselves ennobled by such regard; just as if nature had established and adorned its splendid theatre precisely with this view.

We shall say only one thing more in this paragraph. If we have once discovered in nature a faculty of bringing forth products that can only be thought by us in accordance with the concept of final causes, we go further still. We venture to judge that things belong to a system of purposes, which yet do not (either in themselves or in their purposive relations) necessitate our seeking for any principle of their possibility beyond the mechanism of causes working blindly. For the first Idea, as concerns its ground, already brings us beyond the world of sense; since the unity of the supersensible principle must be regarded as valid in this way not merely for certain species of natural beings, but for the whole of nature as a system.

§ 68. Of the principle of Teleology as internal principle of natural science

The principles of a science are either internal to it and are then called domestic (principia domestica), or are based on concepts that can only find their place outside it and so are foreign principles (peregrina). Sciences that contain the latter, place at the basis of their doctrines auxiliary propositions (lemmata), i.e. they borrow some concept, and with it a ground of arrangement, from another science.

Every science is in itself a system, and it is not enough in it to build in accordance with principles and thus to employ a technical procedure, but we must go to work with it architectonically, as a building subsisting for itself; we must not treat it as an additional wing or part of another building, but as a whole in itself, although we may subsequently make a passage from it into that other or conversely.

If then we introduce into the context of natural science the concept of God in order to explain the purposiveness in nature, and subsequently use this purposiveness to prove that there is a God, there is no internal consistency in either science [i.e. either in natural science or theology]; and a delusive circle brings them both into uncertainty, because they have allowed their boundaries to overlap.

The expression, a purpose of nature, already sufficiently prevents the confusion of mixing up natural science and the occasion that it gives for judging teleologically of its objects, with the consideration of God, and so of a theological derivation of them. We must not regard it as insignificant, if one interchanges this expression with that of a divine purpose in the ordering of nature, or gives out the latter as more suitable and proper for a pious soul, because it must come in the end to deriving these purposive forms in nature from a wise author of the world. On the contrary, we must carefully and modestly limit ourselves to the expression, a purpose of nature, which asserts exactly as much as we know. Before we ask after the cause of nature itself, we find in nature, and in the course of its development, products of the same kind which are developed in it according to known empirical laws, in accordance with which natural science must judge of its objects, and, consequently, must seek in nature their causality according to the rule of purposes. So then it must not transgress its bounds in order to introduce into itself as a domestic principle that, to whose concept no experience can be commensurate, upon which we are only entitled to venture after the completion of natural science.

Natural characteristics which demonstrate themselves a priori, and consequently admit of insight into their possibility from universal principles without any admixture of experience, although they carry with them a technical purposiveness, yet cannot, because they are absolutely necessary, be referred to the Teleology of nature, as to a method belonging to Physic for solving its problems. Arithmetical or geometrical analogies, as well as universal mechanical laws,—however strange and admirable may seem to us the union of different rules, quite independent of one another according to all appearance, in a single principle,—possess on that account no claim to be teleological grounds of explanation in Physic. Even if they deserve to be brought into consideration in the universal theory of the purposiveness of things of nature, yet they belong to another [science], i.e. Metaphysic, and constitute no internal principle of natural science; as with the empirical laws of natural purposes in organised beings, it is not only permissible but unavoidable to use the teleological mode of judging as a principle of the doctrine of nature in regard to a particular class of its objects.

So to the end that Physic may keep within its own bounds, it abstracts itself entirely from the question, whether natural purposes are designed or undesigned; for that would be to meddle in an extraneous business, in Metaphysic. It is enough that there are objects, alone explicable according to natural laws which we can only think by means of the Idea of purposes as principle, and also alone internally cognisable as concerns their internal form, in this way. In order, therefore, to remove the suspicion of the slightest assumption,—as if we wished to mix with our grounds of cognition something not belonging to Physic at all, viz. a supernatural cause,—we speak in Teleology, indeed, of nature as if the purposiveness therein were designed, but in such a way that this design is ascribed to nature, i.e. to matter. Now in this way there can be no misunderstanding, because no design in the proper meaning of the word can possibly be ascribed to inanimate matter; we thus give notice that this word here only expresses a principle of the reflective not of the determinant Judgement, and so is to introduce no particular ground of causality; but only adds for the use of the Reason a different kind of investigation from that according to mechanical laws, in order to supplement the inadequacy of the latter even for empirical research into all particular laws of nature. Hence we speak quite correctly in Teleology, so far as it is referred to Physic, of the wisdom, the economy, the forethought, the beneficence of Nature, without either making an intelligent being of it, for that would be preposterous; or even without presuming to place another intelligent Being above it as its Architect, for that would be presumptuous.111 But there should be only signified thereby a kind of causality of nature after the analogy of our own in the technical use of Reason, in order to have before us the rule according to which certain products of nature must be investigated.

But now why is it that Teleology usually forms no proper part of theoretical natural science, but is regarded as a propaedeutic or transition to Theology? This is done in order to restrict the study of nature, mechanically considered, to that which we can so subject to observation or experiment that we are able to produce it ourselves as nature does, or at least by similar laws. For we see into a thing completely only so far as we can make it in accordance with our concepts and bring it to completion. But organisation, as an inner purpose of nature, infinitely surpasses all our faculty of presenting the like by means of art. And as concerns the external contrivances of nature regarded as purposive (wind, rain, etc.), Physic, indeed, considers their mechanism, but it cannot at all present their reference to purposes, so far as this is a condition necessarily belonging to cause; for this necessity of connexion has to do altogether with the combination of our concepts and not with the constitution of things.

SECOND DIVISION DIALECTIC OF THE TELEOLOGICAL JUDGEMENT

§ 69. What is an antinomy of the Judgement?

The determinant Judgement has for itself no principles which are the foundation of concepts of Objects. It has no autonomy, for it subsumes only under given laws or concepts as principles. Hence it is exposed to no danger of an antinomy of its own or to a conflict of its principles. So [we saw that] the transcendental Judgement which contains the conditions of subsuming under categories was for itself not nomothetic, but that it only indicated the conditions of sensuous intuition, under which reality (application) can be supplied to a given concept, as law of the Understanding, whereby the Judgement could never fall into discord with itself (at least as far as its principles are concerned).

But the reflective Judgement must subsume under a law, which is not yet given, and is therefore in fact only a principle of reflection upon objects, for which we are objectively quite in want of a law or of a concept of an Object that would be adequate as a principle for the cases that occur. Since now no use of the cognitive faculties can be permitted without principles, the reflective Judgement must in such cases serve as a principle for itself. This, because it is not objective and can supply no ground of cognition of the Object adequate for design, must serve as a mere subjective principle, for the purposive employment of our cognitive faculties, i.e. for reflecting upon a class of objects. Therefore in reference to such cases the reflective Judgement has its maxims—necessary maxims—on behalf of the cognition of natural laws in experience, in order to attain by their means to concepts, even concepts of Reason; since it has absolute need of such in order to learn merely to cognise nature according to its empirical laws.—Between these necessary maxims of the reflective Judgement there may be a conflict and consequently an antinomy, upon which a Dialectic bases itself. If each of two conflicting maxims has its ground in the nature of the cognitive faculties, this may be called a natural Dialectic, and an unavoidable illusion which we must expose and resolve in our Critique, to the end that it may not deceive us.

§ 70. Representation of this antinomy

So far as Reason has to do with nature, as the complex of objects of external sense, it can base itself partly upon laws which the Understanding itself prescribes a priori to nature, partly upon laws which it can extend indefinitely by means of the empirical determinations occurring in experience. To apply the former kind of laws, i.e. the universal laws of material nature in general, the Judgement needs no special principle of reflection, since it is there determinant because an objective principle is given to it through Understanding. But as regards the particular laws that can only be made known to us through experience, there can be under them such great manifoldness and diversity, that the Judgement must serve as its own principle in order to investigate and search into the phenomena of nature in accordance with a law. Such a guiding thread is needed, if we are only to hope for a connected empirical cognition according to a thoroughgoing conformity of nature to law, even its unity according to empirical laws. In this contingent unity of particular laws it may very well happen that the Judgement in its reflection proceeds from two maxims. One of these is suggested to it a priori by the mere Understanding; but the other is prompted by particular experiences, which bring the Reason into play in order to form a judgement upon corporeal nature and its laws in accordance with a particular principle. Hence it comes about that these two kinds of maxims seem to be incapable of existing together, and consequently a Dialectic arises which leads the Judgement into error in the principle of its reflection.

The first maxim of Judgement is the proposition: all production of material things and their forms must be judged to be possible according to merely mechanical laws.

The second maxim is the counter-proposition: some products of material nature cannot be judged to be possible according to merely mechanical laws. (To judge them requires quite a different law of causality, namely, that of final causes.)

If these regulative principles of investigation be converted into constitutive principles of the possibility of Objects, they will run thus:

Proposition: All production of material things is possible according to merely mechanical laws.

Counter-proposition: Some production of material things is not possible according to merely mechanical laws.

In this latter aspect, as objective principles for the determinant Judgement, they would contradict each other; and consequently one of the two propositions must necessarily be false. We shall then, it is true, have an antinomy, but not of Judgement; there will be a conflict in the legislation of Reason. Reason, however, can prove neither the one nor the other of these fundamental propositions, because we can have a priori no determinant principle of the possibility of things according to mere empirical laws of nature.

On the other hand, as regards the first-mentioned maxims of a reflective Judgement, they involve no contradiction in fact. For if I say, I must judge, according to merely mechanical laws, of the possibility of all events in material nature, and consequently of all forms regarded as its products, I do not therefore say: They are possible in this way alone (apart from any other kind of causality). All that is implied is: I must always reflect upon them according to the principle of the mere mechanism of nature, and consequently investigate this as far as I can; because unless this lies at the basis of investigation, there can be no proper knowledge of nature at all. But this does not prevent us, if occasion offers, from following out the second maxim in the case of certain natural forms (and even by occasion of these in the whole of nature), in order to reflect upon them according to the principle of final causes, which is quite a different thing from explaining them according to the mechanism of nature. Reflection in accordance with the first maxim is thus not abrogated; on the contrary, we are told to follow it as far as we can. Nor is it said that these forms would not be possible in accordance with the mechanism of nature. It is only asserted that human Reason in following up this maxim and in this way could never find the least ground for that which constitutes the specific [character] of a natural purpose, although it would increase its knowledge of natural laws. Thus it is left undecided whether or not in the unknown inner ground of nature, physico-mechanical and purposive combination may be united in the same things in one principle. We only say that our Reason is not in a position so to unite them; and that therefore the Judgement (as reflective—from subjective grounds, not as determinant, in consequence of an objective principle of the possibility of things in themselves) is compelled to think a different principle from that of natural mechanism as the ground of the possibility of certain forms in nature.

§ 71. Preliminary to the solution of the above antinomy

We can in no way prove the impossibility of the production of organised natural products by the mere mechanism of nature, because we cannot see into the first inner ground of the infinite multiplicity of the particular laws of nature, which are contingent for us since they are only empirically known; and so we cannot arrive at the inner all-sufficient principle of the possibility of a nature (a principle which lies in the supersensible). Whether therefore the productive faculty of nature is sufficient for that which we judge to be formed or combined in accordance with the Idea of purposes, as well as for that which we believe to require merely a mechanical system [Maschinenwesen] of nature; or whether there lies at the basis of things which we must necessarily judge as properly natural purposes, a quite different kind of original causality, which cannot be contained in material nature or in its intelligible substrate, viz. an architectonic Understanding—this is a question to which our Reason, very narrowly limited in respect of the concept of causality if it is to be specified a priori, can give no answer whatever.—But it is just as certain and beyond doubt that, in regard to our cognitive faculties, the mere mechanism of nature can furnish no ground of explanation of the production of organised beings. For the reflective Judgement it is therefore a quite correct fundamental proposition, that for that connexion of things according to final causes which is so plain, there must be thought a causality distinct from that of mechanism, viz. that of an (intelligent) cause of the world acting in accordance with purposes; but for the determinant Judgement this would be a hasty and unprovable proposition. In the first case it is a mere maxim of the Judgement, wherein the concept of that causality is a mere Idea, to which we by no means undertake to concede reality, but which we use as a guide to reflection, which remains thereby always open to all mechanical grounds of explanation and does not withdraw out of the world of Sense. In the second case the proposition would be an objective principle prescribed by Reason, to which the determinant Judgement must subject itself, whereby however it withdraws beyond the world of Sense into the transcendent and perhaps is led into error.

All appearance of an antinomy between the maxims of the proper physical (mechanical) and the teleological (technical) methods of explanation rests therefore on this; that we confuse a fundamental proposition of the reflective with one of the determinant Judgement, and the autonomy of the first (which has mere subjective validity for our use of Reason in respect of particular empirical laws) with the heteronomy of the second, which must regulate itself according to laws (universal or particular) given to it by the Understanding.

§ 72. Of the different systems which deal with the purposiveness of nature

No one has ever doubted the correctness of the proposition that judgement must be passed upon certain things of nature (organised beings) and their possibility in accordance with the concept of final causes, even if we only desire a guiding thread to learn how to cognise their constitution through observation, without aspiring to an investigation into their first origin. The question therefore can only be: whether this fundamental proposition is merely subjectively valid, i.e. is a mere maxim of our Judgement; or whether it is an objective principle of nature, in accordance with which, apart from its mechanism (according to the mere laws of motion), quite a different kind of causality attaches to it, viz. that of final causes, under which these laws (of moving forces) stand only as intermediate causes.

We could leave this question or problem quite undecided and unsolved speculatively; because if we content ourselves with speculation within the bounds of mere natural knowledge, we have enough in these maxims for the study of nature and for the tracking out of its hidden secrets, as far as human powers reach. There is then indeed a certain presentiment of our Reason or a hint as it were given us by nature, that, by means of this concept of final causes, we go beyond nature, and could unite it to the highest point in the series of causes, if we were to abandon or at least to lay aside for a time the investigation of nature (although we may not have advanced far in it), and seek thenceforth to find out whither this stranger in natural science, viz. the concept of natural purposes, would lead us.

But here these undisputed maxims pass over into problems opening out a wide field for difficulties. Does purposive connexion in nature prove a particular kind of causality? Or is it not rather, considered in itself and in accordance with objective principles, similar to the mechanism of nature, resting on one and the same ground? Only, as this ground in many natural products is often hidden too deep for our investigation, we make trial of a subjective principle, that of art, i.e. of causality according to Ideas, and we ascribe it to nature by analogy. This expedient succeeds in many cases, but seems in some to mislead, and in no case does it justify us in introducing into natural science a particular kind of operation quite distinct from the causality according to the mere mechanical laws of nature. We give the name of Technic to the procedure (the causality) of nature, on account of the appearance of purpose that we find in its products; and we shall divide this into designed (technica intentionalis) and undesigned (technica naturalis). The first is meant to signify that the productive faculty of nature according to final causes must be taken for a particular kind of causality; the second that it is at bottom quite similar to the mechanism of nature, and that its contingent agreement with our artistic concepts and their rules should be explained as a mere subjective condition of judging it, and not, falsely, as a particular kind of natural production.

If we now speak of systems explanatory of nature in regard of final causes, it must be remarked that they all controvert each other dogmatically, i.e. as to objective principles of the possibility of things, whether there are causes which act designedly or whether they are quite without design. They do not dispute as to the subjective maxims, by which we merely judge of the causes of such purposive products. In this latter case disparate principles could very well be unified; but in the former, contradictorily opposed laws annul each other and cannot subsist together.

There are two sorts of systems as to the Technic of nature, i.e. its productive power in accordance with the rule of purposes; viz. Idealism or Realism of natural purposes. The first maintains that all purposiveness of nature is undesigned; the second that some (in organised beings) is designed. From this latter the hypothetical consequence can be deduced that the Technic of Nature, as concerns all its other products in reference to the whole of nature, is also designed, i.e. is a purpose.

(1) The Idealism of purposiveness (I always understand here by this, objective purposiveness) is either that of the casuality or the fatality of the determination of nature in the purposive form of its products. The former principle treats of the reference of matter to the physical basis of its form, viz. the laws of motion; the second, its reference to the hyperphysical basis of itself and of the whole of nature. The system of casuality that is ascribed to Epicurus or Democritus is, taken literally, so plainly absurd that it need not detain us. Opposed to this is the system of fatality, of which Spinoza is taken as the author, although it is much older according to all appearance. This, as it appeals to something supersensible to which our insight does not extend, is not so easy to controvert; but that is because its concept of the original Being is not possible to understand. But so much is clear, that on this theory the purposive combination in the world must be taken as undesigned; for although derived from an original Being, it is not derived from its Understanding or from any design on its part, but rather from the necessity of its nature and of the world-unity which emanates therefrom. Consequently the Fatalism of purposiveness is at the same time an Idealism.

(2) The Realism of the purposiveness of nature is also either physical or hyperphysical. The former bases the purposes in nature, by the analogy of a faculty acting with design, on the life of matter (either its own or the life of an inner principle in it, a world-soul) and is called Hylozoism. The latter derives them from the original ground of the universe, as from an intelligent Being (originally living), who produces them with design, and is Theism.112

§ 73. None of the above systems give what they pretend

What do all these systems desire? They desire to explain our teleological judgements about nature, and they go so to work therewith that some deny their truth and, consequently, explain them as an Idealism of Nature (represented as Art); others recognise them as true, and promise to establish the possibility of a nature in accordance with the Idea of final causes.

(1) The systems which defend the Idealism of final causes in nature grant, it is true, on the one hand to their principle a causality in accordance with the laws of motion (through which [causality] natural things exist purposively); but they deny to it intentionality, i.e. that it designedly determines itself to this its purposive production; in other words, they deny that the cause is a purpose. This is Epicurus’s method of explanation, according to which the distinction between a Technic of nature and mere mechanism is altogether denied. Blind chance is taken as the explanatory ground not only of the agreement of the developed products with our concepts of the purpose, and consequently of [nature’s] Technic; but also of the determination of the causes of this production in accordance with the laws of motion, and consequently of their mechanism. Thus nothing is explained, not even the illusion in our teleological judgements, and consequently, the would-be Idealism of these in no way established.

On the other hand, Spinoza wishes to dispense with all inquiries into the ground of the possibility of purposes of nature, and to take away all reality from this Idea. He allows their validity in general not as products but as accidents inhering in an original Being; and to this Being, as substrate of those natural things, he ascribes not causality in regard to them but mere subsistence. On account of its unconditioned necessity, and also that of all natural things as accidents inhering in it, he secures, it is true, to the forms of nature that unity of ground which is requisite for all purposiveness; but at the same time he tears away their contingence, without which no unity of purpose can be thought, and with it all design, inasmuch as he takes away all intelligence from the original ground of natural things.

But Spinozism does not furnish what it desires. It desires to afford an explanatory ground of the purposive connexion (which it does not deny) of the things of nature, and it merely speaks of the unity of the subject in which they all inhere. But even if we concede to it that the beings of the world exist in this way, such ontological unity is not therefore a unity of purpose, and does not make this in any way comprehensible. For this latter is a quite particular kind of unity which does not follow from the connexion of things (the beings of the world) in a subject (the original Being), but implies in itself reference to a cause which has Understanding; and even if we unite all these things in a simple subject, this never exhibits a purposive reference. For we do not think of them, first, as the inner effects of the substance, as if it were a cause; nor, secondly, of this cause as a cause producing effects by means of its Understanding. Without these formal conditions all unity is mere natural necessity; and, if it is ascribed as well to things which we represent as external to one another, blind necessity. But if we wish to give the name of purposiveness of nature to that which the schoolmen call the transcendental perfection of things (in reference to their proper being), according to which everything has in itself that which is requisite to make it one thing and not another, then we are only like children playing with words instead of concepts. For if all things must be thought as purposes, then to be a thing is the same as to be a purpose, and there is at bottom nothing which specially deserves to be represented as a purpose.

We hence see at once that Spinoza by his reducing our concepts of the purposive in nature to our own consciousness of existing in an all-embracing (though simple) Being, and by his seeking that form merely in the unity of this Being, must have intended to maintain not the realism, but the idealism of its purposiveness. Even this he was not able to accomplish, because the mere representation of the unity of the substrate cannot bring about the Idea of a purposiveness, even that which is only undesigned.

(2) Those who not only maintain the Realism of natural purposes, but also set about explaining it, believe that they can comprehend, at least as regards its possibility, a practical kind of causality, viz. that of causes working designedly; otherwise they could not undertake to supply this explanation. For to authorise even the most daring of hypotheses, at least the possibility of what we assume as basis must be certain, and we must be able to assure objective reality to its concept.

But the possibility of living matter cannot even be thought; its concept involves a contradiction because lifelessness, inertia, constitutes the essential character of matter. The possibility of matter endowed with life, and of collective nature regarded as an animal, can only be used in an inadequate way (in the interests of the hypothesis of purposiveness in the whole of nature), so far as it is manifested by experience in the organisation of nature on a small scale; but in no way can we have insight into its possibility a priori. There must then be a circle in the explanation, if we wish to derive the purposiveness of nature in organised beings from the life of matter, and yet only know this life in organised beings, and can form no concept of its possibility without experience of this kind. Hylozoism, therefore, does not furnish what it promises.

Finally, Theism can just as little establish dogmatically the possibility of natural purposes as a key to Teleology; although it certainly is superior to all other grounds of explanation in that, through the Understanding which it ascribes to the original Being, it rescues in the best way the purposiveness of nature from Idealism, and introduces a causality acting with design for its production.

But we must first prove satisfactorily to the determinant Judgement the impossibility of the unity of purpose in matter resulting from its mere mechanism, before we are justified in placing the ground of this beyond nature in a determinate way. We can, however, advance no further than this. In accordance with the constitution and limits of our cognitive faculties (whilst we do not comprehend even the first inner ground of this mechanism) we must in no wise seek in matter a principle of determinate purposive references; but no other way of judging of the origination of its products as natural purposes remains to us than that by means of a supreme Understanding as cause of the world. But this is only a ground for the reflective, not for the determinant Judgement, and can justify absolutely no objective assertion.

§ 74. The reason that we cannot treat the concept of a Technic of nature dogmatically is the fact that a natural purpose is inexplicable

We deal with a concept dogmatically (even though it should be empirically conditioned) if we consider it as contained under another concept of the Object which constitutes a principle113 of Reason, and determine it in conformity with this. But we deal with it merely critically, if we consider it only in reference to our cognitive faculties and consequently to the subjective conditions of thinking it, without undertaking to decide anything about its Object. Dogmatic procedure with a concept is then that which is conformable to law for the determinant Judgement, critical procedure for the reflective Judgement.

Now the concept of a thing as a natural purpose is a concept which subsumes nature under a causality only thinkable through Reason, in order to judge in accordance with this principle about that which is given of the Object in experience. But in order to use it dogmatically for the determinant Judgement, we must be assured first of the objective reality of this concept, because otherwise we could subsume no natural thing under it. Again, the concept of a thing as a natural purpose is, no doubt, empirically conditioned, i.e. only possible under certain conditions given in experience, though not to be abstracted therefrom; but it is a concept only possible in accordance with a rational principle in the judgement about the object. Its objective reality, therefore (i.e. that an object in conformity with it is possible), cannot be comprehended and dogmatically established as such a principle; and we do not know whether it is merely a sophistical and objectively empty concept (conceptus ratiocinans), or a rational concept, establishing a cognition and confirmed by Reason (conceptus ratiocinatus).114 Therefore it cannot be dogmatically treated for the determinant Judgement, i.e. it is not only impossible to decide whether or not things of nature considered as natural purposes require for their production a causality of a quite peculiar kind (that acting on design); but the question cannot even be put, because the concept of a natural purpose is simply not susceptible of proof through Reason as regards its objective reality. That is, it is not constitutive for the determinant Judgement, but merely regulative for the reflective.

That it is not susceptible of proof is clear because (as concept of a natural product) it embraces in itself natural necessity, and at the same time (as purpose) a contingency of the form of the Object (in reference to the mere laws of nature) in the very same thing. Hence, if there is to be no contradiction here it must contain a ground for the possibility of the thing in nature, and also a ground of the possibility of this nature itself and of its reference to something which, not being empirically cognisable nature (supersensible), is therefore for us not cognisable at all. [This is requisite] if it is to be judged according to a different kind of causality from that of natural mechanism when we wish to establish its possibility. The concept of a thing, then, as a natural purpose, is transcendent for the determinant Judgement, if we consider the Object through Reason (although for the reflective Judgement it certainly may be immanent in respect of the objects of experience). Hence for determinant judgements objective reality cannot be supplied to it; and so it is intelligible how all systems that one may project for the dogmatic treatment of the concept of natural purposes and of nature itself [considered] as a whole connected together by means of final causes, can decide nothing either by objective affirmation or by objective denial. For if things be subsumed under a concept that is merely problematical, its synthetical predicates (e.g. in the question whether the purpose of nature which we conceive for the production of things is designed or undesigned) can furnish only problematical judgements of the Object, whether affirmative or negative; and we do not know whether we are judging about something or about nothing. The concept of a causality through purposes (of art) has at all events objective reality, and also the concept of a causality according to the mechanism of nature. But the concept of a causality of nature according to the rule of purposes,—still more of a Being such as cannot be given us in experience, a Being who is the original cause of nature,—though it can be thought without contradiction, yet is of no avail for dogmatic determinations. For, since it cannot be derived from experience, and also is not requisite for the possibility thereof, its objective reality can in no way be assured. But even if this could be done, how can I number among the products of nature things which are definitely accounted products of divine art, when it is just the incapacity of nature to produce such things according to its own laws that made it necessary to invoke a cause different from it?

§ 75. The concept of an objective purposiveness of nature is a critical principle of Reason for the reflective Judgement

It is then one thing to say, “the production of certain things of nature or that of collective nature is only possible through a cause which determines itself to action according to design”; and quite another to say, “I can according to the peculiar constitution of my cognitive faculties judge concerning the possibility of these things and their production, in no other fashion than by conceiving for this a cause working according to design, i.e. a Being which is productive in a way analogous to the causality of an intelligence.” In the former case I wish to establish something concerning the Object, and am bound to establish the objective reality of an assumed concept; in the latter, Reason only determines the use of my cognitive faculties, conformably to their peculiarities and to the essential conditions of their range and their limits. Thus the former principle is an objective proposition for the determinant Judgement, the latter merely a subjective proposition for the reflective Judgement, i.e. a maxim which Reason prescribes to it.

We are in fact indispensably obliged to ascribe the concept of design to nature if we wish to investigate it, though only in its organised products, by continuous observation; and this concept is therefore an absolutely necessary maxim for the empirical use of our Reason. It is plain that once such a guiding thread for the study of nature is admitted and verified, we must at least try the said maxim of Judgement in nature as a whole; because thereby many of nature’s laws might discover themselves, which otherwise, on account of the limitation of our insight into its inner mechanism, would remain hidden. But though in regard to this latter employment that maxim of Judgement is certainly useful, it is not indispensable, for nature as a whole is not given as organised (in the narrow sense of the word above indicated). On the other hand, in regard to those natural products, which must be judged of as designed and not formed otherwise (if we are to have empirical knowledge of their inner constitution), this maxim of the reflective Judgement is essentially necessary; because the very thought of them as organised beings is impossible without combining therewith the thought of their designed production.

Now the concept of a thing whose existence or form we represent to ourselves as possible under the condition of a purpose is inseparably bound up with the concept of its contingency (according to natural laws). Hence the natural things that we find possible only as purposes supply the best proof of the contingency of the world-whole; to the common Understanding and to the philosopher alike they are the only valid ground of proof for its dependence on and origin from a Being existing outside the world—a Being who must also be intelligent on account of that purposive form. Teleology then finds the consummation of its investigations only in Theology.

But what now in the end does the most complete Teleology prove? Does it prove that there is such an intelligent Being? No. It only proves that according to the constitution of our cognitive faculties and in the consequent combination of experience with the highest principles of Reason, we can form absolutely no concept of the possibility of such a world [as this] save by thinking a designedly-working supreme cause thereof. Objectively we cannot therefore lay down the proposition, there is an intelligent original Being; but only subjectively, for the use of our Judgement in its reflection upon the purposes in nature, which can be thought according to no other principle than that of a designing causality of a highest cause.

If we wished to establish on teleological grounds the above proposition dogmatically we should be beset with difficulties from which we could not extricate ourselves. For then the proposition must at bottom be reduced to the conclusion, that the organised beings in the world are no otherwise possible than by a designedly-working cause. And we should unavoidably have to assert that, because we can follow up these things in their causal combination only under the Idea of purposes, and cognise them only according to their conformity to law, we are thereby justified in assuming this as a condition necessary for every thinking and cognising being—a condition consequently attaching to the Object and not merely to our subject. But such an assertion we do not succeed in sustaining. For, since we do not, properly speaking, observe the purposes in nature as designed, but only in our reflection upon its products think this concept as a guiding thread for our Judgement, they are not given to us through the Object. It is quite impossible for us a priori to vindicate, as capable of assumption, such a concept according to its objective reality. It remains therefore a proposition absolutely resting upon subjective conditions alone, viz. of the Judgement reflecting in conformity with our cognitive faculties. If we expressed this proposition dogmatically as objectively valid, it would be: “There is a God.” But for us men there is only permissible the limited formula: “We cannot otherwise think and make comprehensible the purposiveness which must lie at the bottom of our cognition of the internal possibility of many natural things, than by representing it and the world in general as a product of an intelligent cause, [a God].”115

Now if this proposition, based on an inevitably necessary maxim of our Judgement, is completely satisfactory from every human point of view for both the speculative and practical use of our Reason, I should like to know what we lose by not being able to prove it as also valid for higher beings, from objective grounds (which unfortunately are beyond our faculties). It is indeed quite certain that we cannot adequately cognise, much less explain, organised beings and their internal possibility, according to mere mechanical principles of nature; and we can say boldly it is alike certain that it is absurd for men to make any such attempt or to hope that another Newton will arise in the future, who shall make comprehensible by us the production of a blade of grass according to natural laws which no design has ordered.116 We must absolutely deny this insight to men. But then how do we know that in nature, if we could penetrate to the principle by which it specifies the universal laws known to us, there cannot lie hidden (in its mere mechanism) a sufficient ground of the possibility of organised beings without supposing any design in their production? would it not be judged by us presumptuous to say this? Probabilities here are of no account when we have to do with judgements of pure Reason.—We cannot therefore judge objectively, either affirmatively or negatively, concerning the proposition: “Does a Being acting according to design lie at the basis of what we rightly call natural purposes, as the cause of the world (and consequently as its author)?” So much only is sure, that if we are to judge according to what is permitted us to see by our own proper nature (the conditions and limitations of our Reason), we can place at the basis of the possibility of these natural purposes nothing else than an intelligent Being. This alone is in conformity with the maxim of our reflective Judgement and therefore with a ground which, though subjective, is inseparably attached to the human race.

§ 76. Remark

This consideration, which very well deserves to be worked out in detail in Transcendental Philosophy, can come in here only in passing, by way of elucidation (not as a proof of what is here proposed).

Reason is a faculty of principles and proceeds in its extremest advance to the unconditioned; on the other hand, the Understanding stands at its service always only under a certain condition which must be given. But without concepts of Understanding, to which objective reality must be given, the Reason cannot form any objective (synthetical) judgement; and contains in itself, as theoretical Reason, absolutely no constitutive but merely regulative principles. We soon see that where the Understanding cannot follow, the Reason is transcendent, and shows itself in Ideas formerly established (as regulative principles), but not in objectively valid concepts. But the Understanding which cannot keep pace with Reason but yet is requisite for the validity of Objects, limits the validity of these Ideas to the subject, although [extending it] generally to all [subjects] of this kind. That is, the Understanding limits their validity to the condition, that according to the nature of our (human) cognitive faculties, or, generally, according to the concept which we ourselves can make of the faculty of a finite intelligent being, nothing else can or must be thought; though this is not to assert that the ground of such a judgement lies in the Object. We shall adduce some examples which, though they are too important and difficult to impose them on the reader as proved propositions, yet will give him material for thought and may serve to elucidate what we are here specially concerned with.

It is indispensably necessary for the human Understanding to distinguish between the possibility and the actuality of things. The ground for this lies in the subject and in the nature of our cognitive faculties. Such a distinction (between the possible and the actual) would not be given were there not requisite for knowledge two quite different elements, Understanding for concepts and sensible intuition for Objects corresponding to them. If our Understanding were intuitive it would have no objects but those which are actual. Concepts (which merely extend to the possibility of an object) and sensible intuitions (which give us something without allowing us to cognise it thus as an object) would both disappear. But now the whole of our distinction between the merely possible and the actual rests on this, that the former only signifies the positing of the representation of a thing in respect of our concept, and, in general, in respect of the faculty of thought; while the latter signifies the positing of the thing in itself [outside this concept].117 The distinction, then, of possible things from actual is one which has merely subjective validity for the human Understanding, because we can always have a thing in our thoughts although it is [really] nothing, or we can represent a thing as given although we have no concept of it. The propositions therefore—that things can be possible without being actual, and that consequently no conclusion can be drawn as to actuality from mere possibility—are quite valid for human Reason, without thereby proving that this distinction lies in things themselves. That this does not follow, and that consequently these propositions, though valid of Objects (in so far as our cognitive faculty, as sensuously conditioned, busies itself with Objects of sense), do not hold for things in general, appears from the irrepressible demand of Reason to assume something (the original ground) necessarily existing as unconditioned, in which possibility and actuality should no longer be distinguished, and for which Idea our Understanding has absolutely no concept; i.e. it can find no way of representing such a thing and its manner of existence. For if the Understanding thinks such a thing (which it may do at pleasure), the thing is merely represented as possible. If it is conscious of it as given in intuition, then is it actual; but nothing as to its possibility is thus thought. Hence the concept of an absolutely necessary Being is no doubt an indispensable Idea of Reason, but yet it is a problematical concept unattainable by the human Understanding. It is indeed valid for the employment of our cognitive faculties in accordance with their peculiar constitution, but not valid of the Object. Nor is it valid for every knowing being, because I cannot presuppose in every such being thought and intuition as two distinct conditions of the exercise of its cognitive faculties, and consequently as conditions of the possibility and actuality of things. An Understanding into which this distinction did not enter, might say: All Objects that I know are, i.e. exist; and the possibility of some, which yet do not exist (i.e. the contingency or the contrasted necessity of those which do exist), might never come into the representation of such a being at all. But what makes it difficult for our Understanding to treat its concepts here as Reason does, is merely that for it, as human Understanding, that is transcendent (i.e. impossible for the subjective conditions of its cognition) which Reason makes into a principle appertaining to the Object.—Here the maxim always holds, that all Objects whose cognition surpasses the faculty of the Understanding are thought by us according to the subjective conditions of the exercise of that faculty which necessarily attach to our (human) nature. If judgements laid down in this way (and there is no other alternative in regard to transcendent concepts) cannot be constitutive principles determining the Object as it is, they will remain regulative principles adapted to the human point of view, immanent in their exercise and sure.