A ship is always safe at the shore - but that is NOT what it is built for.

Classical thermodynamics ... is the only physical theory of universal content which I am convinced ... will never be overthrown.

Nothing will end war unless the peoples themselves refuse to go to war.

The only real valuable thing is intuition. The intellect has little to do on the road to discovery

The real difficulty, the difficulty which has baffled the sages of all times, is rather this: how can we make our teaching so potent in the motional life of man, that its influence should withstand the pressure of the elemental psychic forces in the individual?

To one bent on age, death will come as a release. I feel this quite strongly now that I have grown old myself and have come to regard death like an old debt, at long last to be discharged.

Common sense is the collection of prejudices acquired by age eighteen.