There is only one road to human greatness: through the school of hard knocks.

Concern for man himself must always constitute the chief objective of all technological effort

The most fundamental question we can ever ask ourselves is whether or not the universe we live in is friendly or hostile.

Scientific greatness is less a matter of intelligence than character; if the scientist refuses to compromise or accept incomplete answers and persists in grappling the most basic and difficult questions.

There is separation of colored people from white people in the United States. That separation is not a disease of colored people. It is a disease of white people. I do not intend to be quiet about it.

I never said half the crap people said I did.

Mathematics deals exclusively with the relations of concepts to each other without consideration of their relation to experience.