For most of my life, one of the persons most baffled by my own work was myself.

Some mathematicians didn't even perceive of the possibility of a picture being helpful. To the contrary, I went into an orgy of looking at pictures by the hundreds; the machines became a little bit better.

There is a joke that your hammer will always find nails to hit. I find that perfectly acceptable

Clouds are not spheres, mountains are not cones, coastlines are not circles, and bark is not smooth, nor does lightning travel in a straight line.

Order doesn't come by itself.

The theory of probability is the only mathematical tool available to help map the unknown and the uncontrollable. It is fortunate that this tool, while tricky, is extraordinarily powerful and convenient.

An extraordinary amount of arrogance is present in any claim of having been the first in inventing something.