I have just concluded my series of paintings, I look at them constantly. I who made them often find them horrible. I understand them only at rare moments, when I have forgotten all about them, on days when I feel kindly disposed and indulgent to their poor maker. Sometimes I am horribly afraid to turn round canvases which I have piled against the wall; I am constantly afraid of finding monsters where I believed there were precious gems !.. .Thus it does not astonish me that the critics in London relegate me to the lowest rank. Alas! I fear that they are only too justified! - However, at times I come across works of mine which are soundly done and really in my style, and at such moments I find great solace. But no more of that. Painting, art in general, enchants me. It is my life. What else matters?

I have always concentrated on a far narrower field of subject matter than most other painters, so that the danger of repeating myself has been far greater. I think I have avoid this danger by devoting more time and thought to planning each one of my paintings as a variation on one or the other, of these few themes.

Today it's possible to paint one canvas with the calmness of an ancient Greek and the next with the anxiety of a Van Gogh. Either of these emotions, and any in between, is valid to me.. .I work on many canvasses at once. In the morning I line them up against the wall of my studio. Some speak, some do not. They are my mirrors. They tell me what I am like at that moment.

I don't feel any direct relationship between what I do and existing art. Though there is unavoidable progression: the things all paintings have in common are paint, and color, and some means of application. With the standard you can make any two pictures appear either alike of different. I don't think whether they're alike or different is really very interesting.

You are always related [as an artist] to something. I'm related to the more geometric, or simpler, painting, but the motivation doesn't have anything to do with that kind of European geometric painting. I think the obvious comparison with my work would be Vasarely, and I can't think of anything I like less.. ..the 'Groupe de recherché d'Art visuel' actually painted all the patterns before I did – all the basic designs that are in my painting – I didn't even know about it.. ..it still doesn't have anything to do with my painting. I find all that European geometric painting – sort of post Ma Bill school – a kind of curiosity, very dreary.

I don’t know if I've got close enough [in two recent paintings he made] to what I was really trying to achieve. But at least I've tried, I've made the attempt. I've done what I could. I've gone as far as my powers permitted.