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.

Genius sees the dynamic purpose first, find reasons afterward.

A man who has humility will have acquired in the last reaches of his beliefs the saving doubt of his own certainty.

Social movements are at once the symptoms and the instruments of progress. Ignore them and statesmanship is irrelevant; fail to use them and it is weak.

If all power is in the people, if there is no higher law than their will, and if by counting their votes, their will may be ascertained - then the people may entrust all their power to anyone, and the power of the pretender and the usurper is then legitimate. It is not to be challenged since it came originally from the sovereign people.

The time has come to stop beating our heads against stone walls under the illusion that we have been appointed policeman to the human race.

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