"When you first saw a Cubist or Impressionist picture there was a whole way of instructing the eye of the subconscious. Dabs of color had to stand for real things; it was an abstraction of a guitar or of a hillside. The opposite is going on now [in 1960's]. If you have bands of blue, green and pink, the mind doesn't think sky, grass and flesh. These are colors and the question is what are they doing with themselves and with each other. Sentiment and nuance are being squeezed out so that if something is not altogether flatly painted then there might be a hint of edge, chiaroscuro, shadow and if one wants just that pure thing these associations get in the way."