We educate one another; and we cannot do this if half of us consider the other half not good enough to talk to.

The American Constitution, one of the few modern political documents drawn up by men who were forced by the sternest circumstances to think out what they really had to face, instead of chopping logic in a university classroom.

I ... must continue to strive for more knowledge and more power, though the new knowledge always contradicts the old and the new power is the destruction of the fools who misuse it.

What you are to do without me I cannot imagine.

Think of the fierce energy concentrated in an acorn! You bury it in the ground, and it explodes into an oak! Bury a sheep, and nothing happens but decay.

A book is like a child: it is easier to bring it into the world than to control it when it is launched there.

The English have no respect for their language, and will not teach their children to speak it.