When I speak, however, of the union of separate thoughts and feelings in one complex sentiment or emotion, and of the analytic power of reflection or reason, it must not be conceived, that I use these words in a sense precisely the same as when they are applied to matter. A mass of matter, as we have seen, is, in truth, not _one_ body merely, but a _multitude_ of contiguous bodies; all of which, at the time, may be considered as having a separate existence, and as placed together more by accidental apposition, than by any essential union;--and _analysis_ is nothing more than what its etymology denotes, a _loosening_ of these from each other. In strictness of language, this composition and analysis cannot take place in _mind_. Even the most complex feeling is still only _one_ feeling; for we cannot divide the states or affections of our mind into separate self-existing fractions, as we can divide a compound mass of matter into masses, which are separate and self-existing,--nor distinguish _half_ a joy or sorrow from a _whole_ joy or sorrow. The conception of gold, and the conception of a mountain, may separately arise, and may be followed by the conception of a golden mountain; which may be said to be a compound of the two, in the sense in which I use that word, to express merely, that what is thus termed compound or complex is the result of certain previous feelings, to which, as if existing together, it is felt to have the virtual relation of equality, or the relation which a whole bears to the parts that are comprehended in it. But the conception of a _golden mountain_ is still as much _one_ state or feeling of one simple mind, as either of the separate conceptions of gold and of a mountain which preceded it. In cases of this kind, indeed, it is the very nature of the resulting feeling to seem to us thus complex; and we are led, by the very constitution of our mind itself, to consider what we term a complex idea, as equivalent to the separate ideas from which it results, or as comprehensive of them,--as being truly to our conception--though to our conception only--and, therefore, only virtually or relatively to us the inquirers--the same, as if it were composed of the separate feelings _co-existing_, as the elements of a body co-exist in space.