[learning European modern art by seeing it in the art-magazine 'Cahiers d'art'].... my heritage was all those things; [De Stijl, Constructivism, Cubism, Surrealism] simultaneously, so I am all those things. I hope with a very strong intellectual regard for Cubism, and an admiration for it, because it was great at a particular time. It was both painting and sculpture. It was a great point of liberation in both painting and sculpture, and especially sculpture.

In an interview with David Sylvester (1960), edited for BBC broadcasting: first published in 'Living Arts', April 1964; as quoted in Interviews with American Artists, by David Sylvester; Chatto & Windus, London 2001, p. 8