Hands, are the most honest part of the human body, they cannot lie as laughing eyes and the mouth can.

Drawing is deception.

There is something breathtaking about the basic laws of crystals. They are in no sense a discovery of the human mind; they just "are" - they exist quite independently of us. The most that man can do is become aware, in a moment of clarity, that they are there, and take cognizance of them.

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 never got a pass mark in math ... Just imagine - mathematicians now use my prints to illustrate their books.

He who wonders discovers that this in itself is wonder.

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