A mobile is an abstract sculpture made chiefly out of sheet metal, steel rods, wire and wood. Some or all of these elements move, propelled by electric motors, wind, water or by hand.

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.

My fingers always seem busier than my mind.

Why must art be static? You look at an abstraction, sculptured or painted, an entirely exciting arrangement of planes, spheres, nuclei, entirely without meaning. It would be perfect but it is always still. The next step in sculpture is motion.

To an engineer, good enough means perfect. With an artist, there's no such thing as perfect.

That others grasp what I have in mind seems unessential, at least as long as they have something else in theirs.

To most people who look at a mobile, it's no more than a series of flat objects that move. To a few, though, it may be poetry.