Oscar Wilde, "The Decay of Lying"

Art finds her own perfection within, and not outside of, herself. She is not to be judged by any external standard of resemblance. She is a veil, rather than a mirror. She has flowers that no forests know of, birds that no woodland possesses. She makes and unmakes many worlds, and can draw the moon from heaven with a scarlet thread.

(The Decay of Lying)