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.

I've never found anything to be lacking in a blurry canvas. Quite the contrary: you can see many more things in it than in a sharply focused image. A landscape painted with exactness forces you to see a determined number of clearly differentiated trees, while in a blurry canvas you can perceive as many trees as you want. The painting is more open.

Well, the beginning is actually quite easy, because I can still be quite free about the way I handle things - colours, shapes. And so a picture emerges that may look quite good for a while, so airy and colourful and new. But that will only last for a day at most, at which point it starts to look cheap and fake. And then the real work begins - changing, eradicating, starting again, and so on, until it's done.

The grey is certainly inspired by the photo-paintings, and, of course, it's related to the fact that I think grey is an important colour - the ideal colour for indifference, fence-sitting, keeping quiet, despair. In other words, for states of being and situations that affect one, and for which one would like to find a visual expression.

That was a piece I did in 1963 with Konrad Lueg in a department store, in the furniture department. It was announced in some papers as an exhibition opening, but the people who came didn't know that it was to be a sort of Happening. I don't think it is quite right that it has become so famous anyhow. It was just a lot of fun, and the word itself, Capitalist Realism, hit just right. But it wasn't such a big deal.

Picturing things, taking a view, is what makes us human; art is making sense and giving shape to that sense. It is like the religious search for God.

I don't create blurs. Blurring is not the most important thing; nor is it an identity tag for my pictures.