Turning to the colour-classification methodology: The starting point are the four pure colours red, yellow, green and blue; their in-between shades and scales of brightness result in colour schemes containing 16, 64, 256 and 1,024 shades. More colours would be pointless because it wouldn't be possible to distinguish between them clearly.

Well, I don't believe there are subjects that can't be painted, but there are a lot of things that I personally can't paint.

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.

If, while I'm painting, I distort or destroy a motif, it is not a planned or conscious act, but rather it has a different justification: I see the motif, the way I painted it, is somehow ugly or unbearable. Then I try to follow my feelings and make it attractive. And that means a process of painting, changing or destroying - for however long it takes - until I think it has improved. And I don't demand an explanation from myself as to why this is so.

Photography has almost no reality; it is almost a hundred per cent picture. And painting always has reality: you can touch the paint; it has presence; but it always yields a picture - no matter whether good or bad. That's all the theory. It's no good. I once took some small photographs and then smeared them with paint. That partly resolved the problem, and it's really good - better than anything I could ever say on the subject.

I believe that art has a kind of rightness, as in music, when we hear whether or not a note is false

There is sorrow, but I hope one can see that it is sorrow for the people who died so young and so crazy, for nothing. I have respect for them, but also for their wishes, or for the power of their wishes. Because they tried to change the stupid things in the world.