- Marcel Duchamp: I think that people in general when they say they know, they don't know, they believe. I believe that art is the only form of activity in which man and man shows himself to be a true individual. Art is an outlet towards reaches which are not ruled by time and space. To live is to believe. That is my belief.
- Jean Arp: When Dada revealed its eternal wisdom to man, man laughed indulgently and went on talking. Man talks- enough to make the very rats sick to their stomach. He talks so much that the day darkens and the night pales with fright. He talks so much that the sea runs dry and the desert turns to swamp.
- Jean Arp: The content of a sculpture should reveal itself on tiptoe, without pretension, like the track of an animal in the snow.
- Henry Moore: One doesn't do things for the roughness or the smoothness. You do them for what it is you're trying to express. I like the feeling sometimes of their being energy trying to force itself from inside the material outwards, as you get when you have a knuckle, a fist which you're clenching. The bones press from inside and those surfaces have to be smooth. If they were rough, they wouldn't look as though they were being pressed. So sometimes you may smooth a surface. Other times you leave it rough. It's what you want to express.
- Barbara Hepworth: I have often been called puritanical, or cold, or geometric, but I try to make sculptures which will affirm, and re-affirm the magic of the will to life, and the miracle of re-birth and continuity in the universe. It is an act of faith, and an urge which is as inevitable as being feminine.