In short, whatever appears to be fit, and proper to answer great purposes, ever satisfies the mind, and pleases on that account. Uniformity is of this kind. We find it necessary, in some degree, to give the idea of rest and motion, without the possibility of falling. But when any such purposes can be as well effected by more irregular parts, the eye is always better pleased on the account of variety.
How pleasingly is the idea of firmness in standing convey'd to the eye by the three elegant claws of a table, the three feet of a tea-lamp, or the celebrated tripod of the ancients?
Thus you see regularity, uniformity, or symmetry, please only as they serve to give the idea of fitness.
[CHAPTER IV.]
Of Simplicity, or Distinctness.
Simplicity, without variety, is wholly insipid, and at best does only not displease; but when variety is join'd to it, then it pleases, because it enhances the pleasure of variety, by giving the eye the power of enjoying it with ease.
There is no object composed of straight lines, that has so much variety, with so few parts, as the pyramid: and it is its constantly varying from its base gradually upwards in every situation of the eye, (without giving the idea of sameness, as the eye moves round it) that has made it been esteem'd in all ages, in preference to the cone, which in all views appears nearly the same, being varied only by light and shade.