Everybody felt his superiority, but nobody felt oppressed by it. Though he had no illusions about people and human affairs, he was full of kindness toward everybody and everything. Never did he give the impression of domineering, always of serving and helping. He was extremely conscientious, without allowing anything to assume undue importance; a subtle humor guarded him, which was reflected in his eyes and in his smile.

For me a simple message, to think and act with courage, independence and imagination.

Older men start wars, but younger men fight them.

If the bee disappeared off the surface of the globe, then man would have only four years of life left. No more bees, no more pollination, no more plants, no more animals, no more man.

Imagination is more valuable than information.

When I'm judging a theory, I ask myself whether, if I were God, I would have arranged the world in such a way.

Games are the most elevated form of investigation.