Ars Poetica

If a painter should wish to unite a horse’s neck to a human head, and spread a variety of plumage over limbs [of different animals] taken from every part [of nature], so that what is a beautiful woman in the upper part terminates unsightly in an ugly fish below; could you, my friends, refrain from laughter, were you admitted to such a sight Believe, ye Pisos, the book will be perfectly like such a picture, the ideas of which, like a sick man’s dreams, are all vain and fictitious: so that neither head nor foot can correspond to any one form. “Poets and painters [you will say] have ever had equal authority for attempting any thing.” We are conscious of this, and this privilege we demand and allow in turn: but not to such a degree, that the tame should associate with the savage; nor that serpents should be coupled with birds, lambs with tigers.

In pompous introductions, and such as promise a great deal, it generally happens that one or two verses of purple patch-work, that may make a great show, are tagged on; as when the grove and the altar of Diana and the meandering of a current hastening through pleasant fields, or the river Rhine, or the rainbow is described. But here there was no room for these [fine things]: perhaps, too, you know how to draw a cypress: but what is that to the purpose, if he, who is painted for the given price, is [to be represented as] swimming hopeless out of a shipwreck? A large vase at first was designed: why, as the wheel revolves, turns out a little pitcher? In a word, be your subject what it will, let it be merely simple and uniform.