There is but one bond of peace that is both permanent and enriching: The increasing knowledge of the world in which experiment occurs.

Nobody has yet found a way of bombing that can prevent foot soldiers from walking.

In the blood of the martyrs to intolerance are the seeds of unbelief

Modern men are afraid of the past. It is a record of human achievement, but its other face is human defeat.

Men can know more than their ancestors did if they start with a knowledge of what their ancestors had already learned....That is why a society can be progressive only if it conserves its traditions.

You don't have to preach honesty to men with a creative purpose. A genuine craftsman will not adulterate this product. The reason isn't because duty says he shouldn't, but because passion says he couldn't.

A useful definition of liberty is obtained only by seeking the principle of liberty in the main business of human life, that is to say, in the process by which men educate their responses and learn to control their environment.