They come into being not through demonstration but through revelation, through the medium of powerful personalities.

[Asked about a book in which 100 Nazi professors charged him with scientific error.] Were I wrong, one professor would have been quite enough.

I cannot conceive of a God who rewards and punishes his [sic] creatures, or has a will of the type of which we are conscious ourselves.

I should very much like to remain in the darkness of not having been analyzed.

I do not like to state an opinion on a matter unless I know the precise facts.

Freedom of teaching and of opinion in book or press is the foundation for the sound and natural development of any people.

Try not to become a man of success, but a man of value. Look around at how people want to get more out of life than they put in. A man of value will give more than he receives. Be creative, but make sure that what you create is not a curse for mankind.