[Editor's footnote 44: There is some need for additional elucidation of the class of complex ideas distinguished (under the name of Mixed Modes) by Locke, and recognised by the author of the Analysis, as "put together in a great degree at our discretion;" as "those which the mind forms arbitrarily," so that "the ideas of which they are composed are more or less numerous according to pleasure, and each man of necessity forms his own combination." From these and similar phrases, interpreted literally, it might be supposed that in the instances given, a centaur, a mountain of gold, comfort, meanness, fear, courage, temperance, ignorance, republic, aristocracy, monarchy, piety, good manners, prudence--the elements which constitute these several complex ideas are put together premeditatedly, by an act of will, which each individual performs for himself, and of which he is conscious. This, however, happens only in cases of invention, or of what is called creative imagination. A centaur and a mountain of gold are inventions: combinations intentionally made, at least on the part of the first inventor; and are not copies or likenesses of any combination of impressions received by the senses, nor are supposed to have any such outward phenomena corresponding to them. But the other ideas mentioned in the text, those of courage, temperance, aristocracy, monarchy, &c., are supposed to have real originals outside our thoughts. These ideas, just as much as those of a horse and a tree, are products of generalization and abstraction: they are believed to be ideas of certain points or features in which a number of the clusters of sensations which we call real objects agree: and instead of being formed by intentionally putting together simple ideas, they are formed by stripping off, or rather, by not attending to, such of the simple sensations or ideas entering into the {143} clusters as are peculiar to any of them, and establishing an extremely close association among those which are common to them all. These complex ideas, therefore, are not, in reality, like the creations of mere imagination, put together at discretion, any more than the complex ideas, compounded of the obvious sensible qualities of objects, which we call our ideas of the objects. They are formed in the same manner as these, only not so rapidly or so easily, since the particulars of which they are composed do not obtrude themselves upon the senses, but suppose a perception of qualities and sequences not immediately obvious. From this circumstance results the consequence noticed by the author, that this class of complex ideas are often of different composition in different persons. For, in the first place, different persons abstract their ideas of this sort from different individual instances; and secondly, some persons abstract much better than others; that is, take more accurate notice of the obscurer features of instances, and discern more correctly