When you stop learning, stop listening, stop looking and asking questions, always new questions, then it is time to die.

Faith and doubt both are needed - not as antagonists, but working side by side to take us around the unknown curve.

Segregation is evil; there is no pattern of life which can dehumanize men as can the way of segregation.

None but the weak crave to be better than. Strong men are satisfied with their own strength.

The point of life is to find the delicate equilibrium between dream and reality.

To believe in something not yet proved and to underwrite it with our lives: It is the only way we can leave the future open.

The question in crisis or ordeal is not: Are you going to be an extremist? The question is: What kind of extremist are you going to be?