There is a perfect ant, a perfect bee, but man is perpetually unfinished...Moreover, the incurable unfinishedness keeps man perpetually immature, perpetually capable of learning and growing.

The remarkable thing is that we really love our neighbor as ourselves: we do unto others as we do unto ourselves. We hate others when we hate ourselves. We are tolerant toward others when we tolerate ourselves. We forgive others when we forgive ourselves. We are prone to sacrifice others when we are ready to sacrifice ourselves.

The proselytizing fanatic strengthens his own faith by converting others. The creed whose legitimacy is most easily challenged is likely to develop the strongest proselytizing impulse.

Man was nature's mistake she neglected to finish him and she has never ceased paying for her mistake.

In a time of drastic change, it is the learners who inherit the future.

The quality of ideas seems to play a minor role in mass movement leadership. What counts is the arrogant gesture, the complete disregard of the opinion of others, the singlehanded defiance of the world.

Retribution often means that we eventually do to ourselves what we have done unto others.