"The science is dealing with physical facts; in art we are dealing with psychic effects. With this I come to my first statement: The source of art – that is, where it comes from – is the discrepancy between physical fact and psychic effect. That's what I'm talking about. When I want to speak about why I am doing the same thing now, which is squares, for – how long? – 19 years. Because there is no final solution in any visual formulation.. .I have some assurances that that is not the most stupid thing to do, through Cézanne whom I consider as one of the greatest painters.."