else not included in the same collective idea. (It is obvious that the want of this close affinity and intimate connexion between any number of things is what so far produces a correspondent distinction and separation between one individual and another.) The eye is not the same thing as the ear; it is a contradiction to call it so. Yet both are parts of the same body, which contains these and infinite other distinctions. The reason of this is, that all the parts of the eye have evidently a distinct nature, a separate use, a greater mutual dependence on one another than on those of the ear; at the same time that there is a considerable connexion between the eye and the ear, as parts of the same body and organs of the same mind. Similarity is in general but a subordinate circumstance in determining this relation. For the eye is certainly more like the same organ in another individual, than the different organs of sight and hearing are like one another in the same individual. Yet we do not, in making up the imaginary individual, associate our ideas according to this analogy, which would answer no more purpose than the things themselves would, so separated and so united; but we think of them in that order in which they are mechanically connected together in nature, and in which alone they can serve to any practical purpose. However, it seems hardly possible to define the different degrees or kinds of identity in the same thing by any general rule. The nature of the thing will best point out the sense in which it is to be the same. Individuality may relate either to absolute unity, to the identity or similarity of the parts of any thing, or to an extraordinary degree of connexion between things neither the same, nor similar. This last sense principally determines the positive use of the word, at least with respect to man and other organized beings. Indeed, the term is hardly ever applied in common language to other things. To insist on the first circumstance, namely, absolute unity, as essential to individuality, would be to destroy all individuality; for it would lead to the supposition of as many distinct individuals as there are thoughts, feelings, actions, and properties in the same being. Each thought would be a separate consciousness, each organ a different system. Each thought is a distinct thing in nature; but the individual is composed of numberless thoughts and various faculties, and contradictory passions, and mixed habits, all curiously woven, and blended together in the same conscious being.