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.

Spending money on art has always been frowned upon in this country - even earlier, when my and others' paintings cost almost nothing. Something is always more important. The people in charge are always peddling reasons that others seem to accept. Those who don't drink and aren't crazy, or who don't attract attention with how they behave in public, aren't noticed in art.

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.

We have seen so many exhibits in recent years where the exhibition design was aesthetically beautiful. In this case, if someone wants to get something out of the exhibit, they must neglect the aesthetics and look at my pictures.

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 have always had the feeling that other people are too stupid to discover interesting things. That's why I do it myself. I think of collecting as a way to show that I understand what's important better than others do.

I've painted, but I've also done graphics since as long as I can remember. So even people with little to spend could afford it. But even the graphic works are only bought by those who buy the big, expensive paintings. I think that's troublesome.