When I am finishing a picture I hold some God-made object up to it—a rock, a flower, the branch of a tree or my hand—as a kind of final test. If the painting stands up beside a thing man cannot make, the painting is authentic. If there’s a clash between the two, it is bad art.
Marc Chagall
Marc Chagall (1889–1985), French artist. Saturday Evening Post (New York, December 2, 1962).