I got tired of other's people painting and began to make my own paintings. I found, however, that I not only got tired of looking at my own paintings but that I also didn't like painting them at all. The painterly problems of what to put here and there and how to do it to make it go with what was already there, became more and more difficult and the solutions more and more unsatisfactory. Until finally it became obvious that there had to be a better way.

p. 114 - The Pratt lecture (1960)