The State idea is not according to my heart. I cannot understand why it is needed. It is connected with narrow-minded and economic obstacles. I believe it is bad. I have always been against it.

The American lives even more for his goals, for the future, than the European. Life for him is always becoming, never being.

I don't need to know everything, I just need to know where to find it, when I need it

Everybody should be ashamed who uses the wonders of science and engineering without thinking and having mentally realized not more of it than a cow realizes of the botany of the plants which it eats with pleasure.

Pure mathematics is, in its way, the poetry of logical ideas.

You have to learn the rules of the game. And then you have to play better than anyone else.

The trouble with the younger generation is that they don't stay young for very long.