"The gesture today [c. 1965 in America] is surely more purely abstract than it was. There is a certain moment when one can look so pure that the result is emptiness – many readings of a work of art are eliminated and you are left with one note that may be real and pure but it’s only that, one shaft. For example, the best Mondrian's, Newman's, Noland's, or w:Louis Morris' are deep and beautiful and get better and better. But I think that many of the camp followers are empty."