In contrast to the flux and muddle of life, art is clarity and enduring presence. In the stream of life, few things are perceived clearly because few things stay put. Every mood or emotion is mixed or diluted by contrary and extraneous elements. The clarity of art-the precise evocation of mood in the novel, or of summer twilight in a painting-is like waking to a bright landscape after a long fitful slumber, or the fragrance of chicken soup after a week of head cold.