The stupid speak of the past, the wise of the present, and fools of the future.

Man as an individual is a genius. But men in the mass form the headless monster, a great, brutish idiot that goes where prodded.

Not everything that counts can be counted, and not everything that can be counted counts.

Everything should be made as simple as possible, but not simpler.

Science without religion is lame. Religion without science is blind.

Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction.