Think not of what you see, but what it took to produce what you see.

The most important thing I have done is to combine something esoteric with a practical issue that affects many people.

Fractal geometry is not just a chapter of mathematics, but one that helps Everyman to see the same world differently.

It was astonishing when at one point, I got the idea of how to make artifical clouds with a collaborator, we had pictures made which were theoretically completely artificial pictures based upon that one very simple idea. And this picture everybody views as being clouds.

I had many books and I had dreams of all kinds. Dreams in which were in a certain sense, how to say, easy to make because the near future was always extremely threatening.

If you assume continuity, you can open the well-stocked mathematical toolkit of continuous functions and differential equations, the saws and hammers of engineering and physics for the past two centuries (and the foreseeable future).

Think of color, pitch, loudness, heaviness, and hotness. Each is the topic of a branch of physics