Note 151 — PART II CRITIQUE OF THE TELEOLOGICAL JUDGEMENT (continued 3)

The final purpose which the moral law enjoins upon us to further, is not the ground of duty; since this lies in the moral law, which, as formal practical principle, leads categorically, independently of the Objects of the faculty of desire (the material of the will) and consequently of any purpose whatever. This formal characteristic of my actions (their subordination under the principle of universal validity), wherein alone consists their inner moral worth, is quite in our power; and I can quite well abstract from the possibility or the unattainableness of purposes which I am obliged to promote in conformity with that law (because in them consists only the external worth of my actions) as something which is never completely in my power, in order only to look to that which is of my doing. But then the design of promoting the final purpose of all rational beings (happiness so far as it is possible for it to be accordant with duty) is even yet prescribed by the law of duty. The speculative Reason, however, does not see at all the attainableness of this (neither on the side of our own physical faculty nor on that of the co-operation of nature). It must rather, so far as we can judge in a rational way, hold the derivation, by the aid of such causes, of such a consequence of our good conduct from mere nature (internal and external) without God and immortality, to be an ungrounded and vain, though well-meant, expectation; and if it could have complete certainty of this judgement, it would regard the moral law itself as the mere deception of our Reason in a practical aspect. But since the speculative Reason fully convinces itself that the latter can never take place, but that on the other hand those Ideas whose object lies outside nature can be thought without contradiction, it must for its own practical law and the problem prescribed thereby, and therefore in a moral aspect, recognise those Ideas as real in order not to come into contradiction with itself.