The tyranny of the ignoramuses is insurmountable and assured for all time.

We must learn the difficult lesson that the future of Mankind will only be tolerable when our course, in world affairs as in others, is based upon justice and law rather than the threat of naked power.

One must console oneself with the thought that time has a sieve through which most of these important things run into the ocean of oblivion and what remains after this selection is often still trite and bad.

The bitter and the sweet come from the outside, the hard from within, from one's own efforts.

If you can't explain what you are doing to a nine-year-old, then either you still don't understand it very well, or it's not all that worthwile in the first place.

Applying the axioms of physical science to human life has something reprehensible to it.

Creativity is seeing what others see and thinking what no one else has ever thought.