Only about one per cent of my paintings show family members. Do they help me deal with problems? It's likely that these problems can only be depicted. But photographs, private ones and others, keep appearing that fascinate me so much that I want to paint them. And sometimes the real meaning these images have for me only becomes apparent later.

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.

Art is the highest form of hope.

I go to the studio every day, but I dont paint every day. I love playing with my architectural models. I love making plans. I could spend my life arranging things.

Since there is no such thing as absolute rightness and truth, we always pursue the artificial, leading, human truth. We judge and make a truth that excludes other truths. Art plays a formative part in this manufacture of truth.

Pictures are the idea in visual or pictorial form; and the idea has to be legible, both in the individual picture and in the collective context - which presupposes, of course, that words are used to convey information about the idea and the context. However, none of this means that pictures function as illustrations of an idea: ultimately, they are the idea. Nor is the verbal formulation of the idea a translation of the visual: it simply bears a certain resemblance to the meaning of the idea. It is an interpretation, literally a reflection.

I wanted to make it as anonymous as a photo. But it was perhaps also the wish for perfection, the unapproachable, which then means loss of immediacy. Something is missing then, though; that is why I gave that up.