Since a three-dimensional object casts a two-dimensional shadow, we should be able to imagine the unknown four-dimensional object whose shadow we are. I for my part am fascinated by the search for a one-dimensional object that casts no shadow at all.
Marcel DuchampThe 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 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