I was always on the outside. It was the worst when I still wanted to be a professor, having to deal with colleagues and students, and having to listen to all that academic nonsense. It's really just a haze that keeps them busy. But all of that is fortunately over now, once and for all.

I love my old paintings as postulates as fresh starting points but I have to destroy them. I have to make a new manifesto.

I remember that Michael Werner told me about a famous collector, and Michael set up an appointment for us to meet. This man looked around the room and at my pictures. Then he said, "Young man, why are you doing these horrible things? Look out the window. There are nice girls out there. It's springtime. Look at how beautiful the world can be. You'll ruin your health by smoking so much and doing such tortured things."

I always work out of uncertainty but when a painting's finished it becomes a fixed idea, apparently a final statement. In time though, uncertainty returns.. your thought process goes on.

What counts most is finding new ways to get the world down in paint on my own terms.

That was in 1957. And there I found out that Germany is a kind of province. I didn't know anything about expressionism, about the Bauhaus and Dada and surrealism. I was uneducated, so to speak - and everybody else was more or less uneducated, too.

I always feel attacked when I'm asked about my painting.