You know exactly what I think of photography. I would like to see it make people despise painting until something else will make photography unbearable. (In a letter to Alfred Stieglitz)
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