I have always been aware of different movements and directions in art. But, in general, I'm always bored by any kind of generalization when it comes to artists. I think that there are just single individuals, who are valuable, and they work outside of any group.

I do not have a philosophy about retrospectives. Of course, I cannot change what I have done. What I am doing today, this I can change, in view of whatever I have done before. My retrospectives are like a series of ghosts.

I don't paint over my paintings with black paint. I paint black paintings. It isn't because I'm sad, just as I didn't paint red paintings yesterday because I was happy. Nor will I paint yellow paintings tomorrow because I'm jealous.

A citizen sticks to conventions, does whatever is social. Artists, of course, must reject all conventions. I see no differently in reconciling the best of both of these worlds.

No one who looks at my paintings can see whether a painting is upside down or not anymore. I've made or developed so many image models that some people have given up trying to keep track of me. But others have only one or two ways of doing things and are successful with that.

Unlike the expressionists, I have never been interested in renewing the world through the vehicle of art.

What I could never escape was Germany, and being German.