The smudging makes the paintings a bit more complete. When they're not blurred, so many details seem wrong, and the whole thing is wrong too. Then smudging can help make the painting invincible, surreal, more enigmatic - that's how easy it is.

Of course I constantly despair at my own incapacity, at the impossibility of ever accomplishing anything, of painting a valid, true picture or even knowing what such a thing ought to look like. But then I always have the hope that, if I persevere, it might one day happen. And this hope is nurtured every time something appears, a scattered, partial, initial hint of something which reminds me of what I long for, or which conveys a hint of it – although often enough I have been fooled by a momentary glimpse that then vanishes, leaving behind only the usual thing.

I didn't actually know what the protesters in the West really wanted. It was fantastic here, so much freedom, and that was what they were calling musty, middle-class, and fascistic, a bleak period. Bleak was what the GDR was, and it alone had adopted, almost unchanged, Nazi Germany's methods of intimidation and ideas about propaganda and the use of force.

Composition is a side issue. Its role in my selection of photographs is a negative one at best. By which I mean that the fascination of a photograph is not in its eccentric composition but in what it has to say: its information content. And, on the other hand, composition always also has its own fortuitous rightness.

I believe that the quintessential task of every painter in any time has been to concentrate on the essential.

The Atlas belongs to the Lenbachhaus in Munich - it's long since ceased to belong to me. Occasionally I run across it somewhere, and I think it's interesting because it looks different each time.

Suddenly, I saw it in a new way, as a picture that offered me a new view, free of all the conventional criteria I had always associated with art. It had no style, no composition, no judgment. It freed me from personal experience. For the first time, there was nothing to it: it was pure picture. That's why I wanted to have it, to show it - not use it as a means to painting but use painting as a means to photography.