From Book X of the Republic, where Socrates returns to the poets and painters after the account of the just city. He asks of painting whether it is an imitation “of things as they are, or as they appear”. The argument gave the tradition its first formal question about the truth of images.
Read in contextNow let me ask you another question: Which is the art of painting designed to be—an imitation of things as they are, or as they appear—of appearance or of reality?
Of appearance.
Then the imitator, I said, is a long way off the truth, and can do all things because he lightly touches on a small part of them, and that part an image. For example: A painter will paint a cobbler, carpenter, or any other artist, though he knows nothing of their arts; and, if he is a good artist, he may deceive children or simple persons, when he shows them his picture of a carpenter from a distance, and they will fancy that they are looking at a real carpenter.
