In Abstract Expressionism the paintings symbolize the idea of ground-directedness as opposed to object-directedness. You put something down, react to it, put something else down, and the painting itself becomes a symbol of this. The difference is that rather than symbolize this ground-directedness I do an object-directed appearing thing. There is humor here. The work is still ground-directed; the fact that it's an eyebrow or an almost direct copy of something is unimportant. The ground-directedness is in the painter's mind and not immediately in apparent in the painting. Pop Art makes the statement that ground-directedness is not a quality that the painting has because of what it looks like...

pp. 25-27 - 'What is Pop Art? Interviews with eight painters' (1963)