204. We have seen that Berkeley, having reduced ‘simple ideas’ to their simplicity by showing the illegitimacy of the assumption that they report qualities of a matter which is itself a complex idea, is only able to make his constructive theory march by the supposition of the reality and knowability of ‘spirit’ and relations. ‘Ideas’ are ‘fleeting, perishable passions;’ but the relations between them are uniform, and in virtue of this uniformity the fleeting idea may be interpreted as a symbol of a real order. But such relations, as real, imply the presence of the ideas to the constant mind of God, and, as knowable, their presence to a like mind in us. We have further seen how little Berkeley, according to the method by which he disposed of ‘abstract general ideas,’ was entitled to such a supposition. Hume sets it aside; but the question is, whether without a supposition virtually the same he can represent the association of ideas as doing the work that he assigned to it. ... in regard to ‘spirit’, 205. His exclusion of Berkeley’s supposition with regard to ‘spirit’ is stated without disguise, though unfortunately not till towards the end of the first book of the ‘Treatise on Human Nature,’ which could not have run so smoothly if the statement had been made at the beginning. It follows legitimately from the method, which he inherited, of ‘looking into his mind to see how it wrought.’ ‘From what impression,’ he asks, ‘could the idea of self be derived? It must be some one impression that gives rise to every real idea. But self or person is not any impression, but that to which our several impressions and ideas are supposed to have a reference. If any impression gives rise to the idea of self, that impression must continue invariably the same through the whole course of our lives, since self is supposed to exist after that manner. But there is no impression constant and invariable. Pain and pleasure, grief and joy, passions and sensations succeed each other, and never all exist at the same time. It cannot, therefore, be from any of these impressions, or from any other, that the idea of self is derived; and, consequently, there is no such idea.’ Again: ‘When I enter most intimately into what is called myself, I always stumble on some particular perception of heat or cold, light or shade, love or hatred, pain or pleasure. I never can catch myself at any time without a perception, and never can observe anything but the perception. When my perceptions are removed for any time, as by sound sleep, so long am I insensible of myself, and may truly be said not to exist.’ Thus ‘men are nothing but a bundle or collection of different perceptions that succeed each other with inconceivable rapidity, and are in a perpetual flux or movement. Our eyes cannot turn in their sockets without varying our perceptions. Our thought is still more variable than our sight. ... nor is there any single power of the soul which remains unalterably the same perhaps for one