Jean Arp, quoted in Rudolf Arnheim, Entropy and Art: An Essay on Order and Disorder (Berkeley: University of California Press, 1971), p. 54:
About 1930 the pictures torn by hand from paper came into being. Human work now seemed to me even less than piece-work. It seemed to me removed from life. Everything is approximate, less than approximate, for when more closely and sharply examined, the most perfect picture is a warty, threadbare approximation, a dry porridge, a dismal moon-crater landscape. What arrogance is concealed in perfection. Why struggle for precision, purity, when they Jean Arp can never be attained. The decay that begins immediately on completion of the work was now welcome to me. Dirty man with his dirty fingers points and daubs at a nuance in the picture. This spot is henceforth marked by sweat and grease. He breaks into wild enthusiasm and sprays the picture with spittle. A delicate paper collage of watercolor is lost. Dust and insects are also efficient in destruction. The light fades the colors. Sun and heat make blisters, disintegrate the paper, crack the paint, disintegrate the paint. The dampness creates mould. The work falls apart, dies. The dying of a picture no longer brought me to despair. I had made my pact with its passing, with its death, and now it was part of the picture for me. But death grew and ate up the picture and life. This dissolution must have been followed by the negation of au action. Form had become Unform, the Finite the Infinite, the Individual the Whole.