The further the spiritual evolution of mankind advances, the more certain it seems to me that the path to genuine religiosity does not lie through the fear of life, and the fear of death, and blind faith, but through striving after rational knowledge.

As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality.

I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.

He who joyfully marches to music rank and file, has already earned my contempt. He has been given a large brain by mistake, since for him the spinal cord would surely suffice. This disgrace to civilization should be done away with at once. Heroism at command, how violently I hate

Great spirits have always encountered violent opposition from mediocre minds.

Technological progress is like an axe in the hands of a pathological criminal.

Too many of us look upon Americans as dollar chasers. This is a cruel libel, even if it is reiterated thoughtlessly by the Americans themselves.

“I want to know Gods thoughts…. all the rest are just details