ATHENIAN: And will he who does not know what is true be able to distinguish what is good and bad? My statement is not very clear; but perhaps you will understand me better if I put the matter in another way.
CLEINIAS: How?
ATHENIAN: There are ten thousand likenesses of objects of sight?
CLEINIAS: Yes.
ATHENIAN: And can he who does not know what the exact object is which is imitated, ever know whether the resemblance is truthfully executed? I mean, for example, whether a statue has the proportions of a body, and the true situation of the parts; what those proportions are, and how the parts fit into one another in due order; also their colours and conformations, or whether this is all confused in the execution: do you think that any one can know about this, who does not know what the animal is which has been imitated?
CLEINIAS: Impossible.
ATHENIAN: But even if we know that the thing pictured or sculptured is a man, who has received at the hand of the artist all his proper parts and colours and shapes, must we not also know whether the work is beautiful or in any respect deficient in beauty?
CLEINIAS: If this were not required, Stranger, we should all of us be judges of beauty.
ATHENIAN: Very true; and may we not say that in everything imitated, whether in drawing, music, or any other art, he who is to be a competent judge must possess three things;—he must know, in the first place, of what the imitation is; secondly, he must know that it is true; and thirdly, that it has been well executed in words and melodies and rhythms?
CLEINIAS: Certainly.