The curious thing about that moustache and goatee is that when you look at the Mona Lisa it becomes a man. It is not a woman disguised as a man; it is a real man, and that was my discovery, without realising it at the time.
Marcel DuchampYou cannot define electricity. The same can be said of art. It is a kind of inner current in a human being, or something which needs no definition.
Marcel DuchampThe individual, man as a man, man as a brain, if you like, interests me more than what he makes, because I've noticed that most artists only repeat themselves.
Marcel Duchamp