In 1981, I think, for the Kunsthalle in Düsseldorf. Before that I designed a mirror room for Kasper König's Westkunst show, but it was never built. All that exists is the design - four mirrors for one room.

But I would like to reach the point where I could cut up an illustrated magazine at random and see to it that the parts would each become a painting. I cannot properly explain it right now. Already now I am searching for the most boring and irrelevant photo material that I can find. And I would like to get to the point soon where this determined irrelevance could be retained, in favor of something that would be covered up otherwise by artifice.

To believe, one must have lost God. To paint, one must have lost art.

The political topicality of my October paintings means almost nothing to me, but in many reviews it is the first or only thing that arouses interest, and the response to the pictures varies according to current political circumstance. I find this rather a distraction.

As I see it, all of them - Tachists, Action Painters, Informel artists, and the rest - are only part of an Informel movement that covers a lot of other things as well. I think there's an Informel element in Beuys, as well; but it all began with Duchamp and chance, or with Mondrian, or with the Impressionists. The Informel is the opposite of the constructional quality of classicism - the age of kings, or clearly formed hierarchies.

I first came up with the idea for the colour-chart pictures back in 1966, and my preoccupation with the topic culminated in 1974 with a painting that consisted of 4,096 colour fields. Initially I was attracted by the typical Pop Art aestheticism of using standard colour-sample cards; I preferred the unartistic, tasteful and secular illustration of the different tones to the paintings of Albers, Bill, Calderara, Lohse, etc.

I want pictorial content without sentiment, but I want it as human as possible