The beauty of a moral act depends on the beauty of its expression. To say that it is beautiful is to decide that it will be so. It remains to be proven so. This is the task of images, that is, of the correspondences with the splendors of the physical world. The act is beautiful if it provokes, and in our throat reveals, song. Sometimes the consciousness with which we have pondered a reputedly vile act, the power of expression which must signify it, impels us to song. This means that treachery is beautiful if it makes us sing.

-- Jean Genet, from The Thief's Journal