If a shadow is a two-dimensional projection of the three-dimensional world, then the three-dimensional world as we know it is the projection of the four-dimensional Universe.
Marcel DuchampNo, the thing to do is try to make a painting that will be alive in your own lifetime.
Marcel DuchampAmong our articles of lazy hardware, I recommend the faucet that stops dripping when no one is listening to it.
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 DuchampSince I found that one could make a case shadow from a three-dimensional thing, any object whatsoever - just as the projecting of the sun on the earth makes two dimensions - I thought that by simple intellectual analogy, the fourth dimension could project an object of three dimensions, or, to put it another way, any three-dimensional object, which we see dispassionately, is a projection of something four-dimensional, something we are not familiar with.
Marcel Duchamp