"I find that as the piece gets longer, there has to be less material. That the piece itself, strangely enough, cannot take it. It has nothing to do with my patience. I don't know, my patience, how far it goes, you know. And I don't think about what your patience would be. I don't know that. In other words, I don't have a kind of psychological situation. Let's put it this way. I don't have an anxiety that I've got to stop. But there's less going into it, so I think the piece dies a natural death. It dies of old age."
Morton Feldman (Selected Interviews and Lectures, 1964-1987)