I am always wandering around in enigmas. There are young people who constantly come to tell me: you, too, are making Op Art. I haven't the slightest idea what that is, Op Art. I've been doing this work for thirty years now.

I don't grow up. In me is the small child of my early days.

Drawing is deception.

Science and art sometimes can touch one another, like two pieces of the jigsaw puzzle which is our human life, and that contact may be made across the boderline between the two respective domains.

At moments of great enthusiasm it seems to me that no one in the world has ever made something this beautiful and important.

I try in my prints to testify that we live in a beautiful and orderly world, and not in a formless chaos, as it sometimes seems.

I believe that producing pictures, as I do, is almost solely a question of wanting so very much to do it well.