Note 6 — THE VISIBLE AND TANGIBLE.

"Relatives are known only together: the science of contraries is one. Subject and object, mind and matter, are known only in correlation and contrast, and in the same common act: which knowledge is at once a synthesis and an antithesis of both, and may be indifferently defined an antithetic synthesis and a synthetic antithesis of the terms. Every conception of self necessarily implies a conception of not self; every perception of what is different from me, implies a recognition of the percipient subject in contradistinction from the object perceived. In one object of knowledge, indeed, the object is the prominent element, in another the subject; but there is none in which either is known out of relation to the other. The immediate knowledge which Reid allows of things different from the mind, and the immediate knowledge of mind itself, cannot, therefore, be split into two distinct acts. In perception, as in other faculties, the same indivisible consciousness is conversant about both terms of the relation of knowledge."—Edinburgh Review, No. 103, p. 165.—A very able and elaborate paper, attributed to Sir William Hamilton.