The only thing that interferes with my learning is my education.

The truth of a theory can never be proven, for one never knows if future experience will contradict its conclusions.

The significant problems we have cannot be solved at the same level of thinking with which we created them.

There comes a point in your life when you need to stop reading other people's books and write your own.

Assumptions are made and most assumptions are wrong.

Fear or stupidity has always been the basis of most human actions.

I was very pleased with your kind letter. Until now I never dreamed of being something like a hero. But since you've given me the nomination I feel that I am one.