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 criterions, &c. And it is evident that the ideas taken from such parts of knowledge, as are pretty nearly allied to his particular study, will be of most use to him in it.

Thirdly, Analogy will lead him by degrees, in works of fancy, from the beauties of celebrated masters to others less and less resembling these, till at last he arrives at such as bear no visible resemblance. Deviations, and the subordinate analogies contained within them, will do this in a much greater degree; and all analogies will instruct him how to model properly such entirely new thoughts as his memory and acquaintance with things have suggested to him. In science analogy leads on perpetually to new propositions; and being itself some presumption of truth, is a guide much preferable to mere imagination.

It may be observed, that the trains of visible ideas, which accompany our thoughts, are the principal fund for invention, both in matters of fancy and in science.

As invention requires the three things here spoken of, so, conversely, no person who is possessed of them, and who applies himself to any particular study either of the imaginative or abstract kind, with sufficient assiduity, can fail for want of invention. And the nature of this faculty seems as reconcilable with, and deducible from, the power of association, and the mechanism of the mind here explained, as that of any other.

The Beauty of the Person.

The word beauty is applied to the person, particularly in the female sex, in an eminent manner; and the desires and pleasures arising from beauty, in this sense, may be considered as an intermediate step between the gross sensual ones, and those of pure esteem and benevolence; for they are, in part, deduced from both these extremes; they moderate, spiritualize, and improve the first, and, in the virtuous, are ultimately converted into the last.

But they arise also from many other sources in their intermediate state, particularly from associations with the several beauties of nature and art already mentioned, as of gay colours, rural scenes, music, painting, and poetry; from associations with fashion, the opinions and encomiums of others, riches, honours, high birth, &c. from vanity and ambition, &c. Besides which, the pleasure of gratifying a strong desire, and the pain of disappointment, are to be considered here, as being evidently distinguishable from all the rest in some cases.

That part of beauty which arises from symmetry, may perhaps be said to consist in such proportions of the features of the face, and of the head, trunk, and limbs, to each other, as are intermediate in respect of all other proportions, i.e. such proportions as would result from an estimation by an average: one may say