Almost all the other fellows do not look from the facts to the theory but from the theory to the facts; they cannot get out of the network of already accepted concepts; instead, comically, they only wriggle about inside.

I am not only a pacifist but a militant pacifist. I am willing to fight for peace. Nothing will end war unless the people themselves refuse to go to war.

Insofar as mathematics is true, it does not describe the real world. Insofar as it describes the real world, it is not true.

We cannot despair of humanity, since we ourselves are human beings.

God is clever, but not dishonest.

... a person who is religiously enlightened appears to me to be one who has, to the best of his ability, liberated himself from the fetters of his selfish desires and is preoccupied with thoughts, feelings, and aspirations to which he clings because of their superpersonal value.

Mere praise of peace is easy and ineffective. What is needed is acitve participation in the fight against war and everything which leads to it.