Abstract pictures are fictive models, because they make visible a reality that we can neither see nor describe, but whose existence we can postulate.

The year is always correct, also the month, only the day can be another. But that occurs to me only in the moment of writing it down.

My landscapes are not only beautiful, or nostalgic, with a Romantic or classical suggestion of lost Paradises, but above all 'untruthful.' By 'untruthful,' I mean the glorifying way we look at Nature. Nature, which in all its forms is always against us, because it knows no meaning, no pity, no sympathy, because it knows nothing and is absolutely mindless, the total antithesis of ourselves.

Everything has a reason, including the selection of the photos, which was not arbitrary but appropriate to the period, its highs and lows and my sense of them.

It can be a work by Mondrian, a piece of music by Schönberg or Mozart, a painting by Leonardo, Barnett Newman or also Jackson Pollock. That's beautiful to me. But also nature. A person can be beautiful as well. And beauty is also defined as 'untouched'. Indeed, that's an ideal: that we humans are untouched and therefore beautiful.

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.

Maybe we didn't even have a chance. The message of American Pop Art was so powerful and so optimistic. But it was also very limited, and that led us to believe that we could somehow distance ourselves from it and communicate a different intention.