Ask an impertinent question and you are on the way to the pertinent answer.

It is important that students bring a certain ragamuffin, barefoot irreverence to their studies; they are not here to worship what is known, but to question it.

Dissent is the mark of freedom.

The largest single step in the ascent of man is the change from nomad to village agriculture.

The problem of values arises only when men try to fit together their need to be social animals with their need to be free men. There is no problem, and there are no values, until men want to do both. If an anarchist wants only freedom, whatever the cost, he will prefer the jungle of man at war with man. And if a tyrant wants only social order, he will create the totalitarian state.

The human baby, the human being, is a mosaic of animal and angel.

The hand is the cutting edge of the mind.