There have been poverty, pestilence, and famine, which were due to man's inadequate mastery of nature. There have been wars, oppressions and tortures which have been due to men's hostility to their fellow men.

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Why repeat the old errors, if there are so many new errors to commit?

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The time you enjoy wasting is not wasted time.

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The key to happiness is accepting one unpleasant reality every day.

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If an opinion contrary to your own makes you angry, that is a sign that you are subconsciously aware of having no good reason for thinking as you do.

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The most valuable things in life are not measured in monetary terms. The really important things are not houses and lands, stocks and bonds, automobiles and real state, but friendships, trust, confidence, empathy, mercy, love and faith.

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The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts.

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The first step in a fascist movement is the combination under an energetic leader of a number of men who possess more than the average share of leisure, brutality, and stupidity. The next step is to fascinate fools and muzzle the intelligent, by emotional excitement on the one hand and terrorism on the other.

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Fear is the main source of superstition, and one of the main sources of cruelty. To conquer fear is the beginning of wisdom.

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Not to be absolutely certain is, I think, one of the essential things in rationality.

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