There is no area of the world that should not be investigated by scientists. There will always remain some questions that have not been answered. In general, these are the questions that have not yet been posed.

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

I try to identify myself with the atoms ... I ask what I would do If I were a carbon atom or a sodium atom.

If you want to have good ideas you must have many 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.

We may say that life has borrowed from inanimate processes the same basic mechanism used in producing those striking structures that are crystals, with their beautiful plane faces.