If we compare Europe with other continents, it is marked out as [another] persecuting continent.

I am as firmly convinced that religions do harm as I am that they are untrue.

[Industrialism's soon diminishing] capacity to supply human needs could be prevented if men exercised any restraint or foresight in their present frenzied exploitation.

The life of man is a long march through the night, surrounded by invisible foes, tortured by weariness and pain, towards a goal that few can hope to reach, and where none may tarry long.

The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts.

Fools and fanatics are always so certain of themselves.

Americans need rest, but do not know it. I believe this to be a large part of the explanation of the crime wave in the United States.