I see in Nature a magnificent structure... that must fill a thinking person with a feeling of humility.

God is subtle but he is not malicious.

Adversity introduces a man to himself.

From a certain temperature on, the molecules 'condense' without attractive forces; that is, they accumulate at zero velocity. The theory is pretty, but is there some truth in it.

Ever since childhood I have scorned the commonplace limits so often set upon human ambition. Possessions, outward success, publicity, luxury - to me these have always been contemptible. I believe that a simple and unassuming manner of life is best for everyone; best both for the body and the mind

If I were to remain silent, I'd be guilty of complicity.

When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity.