Satisfaction of one's curiosity is one of the greatest sources of happiness in life.

Man's great power of thinking, remembering, and communicating are responsible for the evolution of civilization.

The best way to have a good idea is to have a lot of ideas.

I like people. I like animals, too -- whales and quail, dinosaurs and dodos. But I like human beings especially, and I am unhappy that the pool of human germ plasm, which determines the nature of the human race, is deteriorating.

Science is the search for truth - it is not a game in which one tries to beat his opponent, to do harm to others.