Out yonder there was this huge world, which exists independently of us human beings and which stands before us like a great, eternal riddle, at least partially accessible to our inspection and thinking. The contemplation of this world beckoned like a liberation…

Science can flourish only in an atmosphere of free speech. Hail to the man who went through life always helping others, knowing no fear, and to whom aggressiveness and resentment are alien A happy man is too satisfied with the present to dwell too much on the future.

I speak to everyone in the same way, whether he is the garbage man or the president of the university.

Man would indeed be in a poor way if he had to be restrained by fear of punishment and hopes of reward after death.

The great moral teachers of humanity were, in a way, artistic geniuses in the art of living.