The admission of approximation is necessary, for one cannot hope to be absolute in his precision. He cannot see, or even conceive of a thing from all… - Alexander Calder

Question, Léger once called you a realist. How do you feel about this?
Yes, I think I am a realist. Because I make what I see. It's only the problem of seeing it. If you can imagine a thing, conjure it up in space - then you can make it, and tout de suite you're a realist. The universe is real but you can't see it. You have to imagine it. Once you imagine it, you can be realistic about reproducing it.

I think that at that time and practically ever since, the underlying sense of form in my work has been the system of the Universe, or part thereof. For that is a rather large model to work from.

Question: Which has influenced you more, nature or modern machinery?
I haven't really touched machinery except for a few elementary mechanisms like levers and balances. You see nature and then you try to emulate it. But, of course, when I met Mondrian [Paris, 1930] I went home and tried to paint [for a while]. The basis of everything for me is the universe. The simplest forms in the universe are the sphere and the circle. I represent them by disks and then I vary them. My whole theory about art is the disparity that exists between form, masses and movement. Even my triangles are spheres, but they are spheres of a different shape.