And last are the few whose delight is in meditation and understanding; who yearn not for goods, nor for victory, but for knowledge; who leave both market and battlefield to lose themselves in the quiet clarity of secluded thought; whose will is a light rather than a fire, whose haven is not power but truth: these are the men of wisdom, who stand aside unused by the world.

Philosophy is harmonized knowledge making a harmonious life; it is the self-discipline which lifts us to serenity and freedom. Knowledge is power, but only wisdom is liberty.

Every science begins as philosophy and ends as art; it arises in hypothesis and flows into achievement.

Most of us spend too much time on the last twenty-four hours and too little on the last six thousand years.

Civilizaton is the interval between Ice Ages.

Liberty is a luxury of security; the free individual is a product and a mark of civilization.

The great snare of thought is uncritical acceptance of irrational assumptions.