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Knowledge comes, but wisdom lingers.

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I feel about airplanes the way I feel about diets. It seems to me they are wonderful things for other people to go on.

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At 18 our convictions are hills from which we look; At 45 they are caves in which we hide.

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First there is a time when we believe everything, then for a little while we believe with discrimination, then we believe nothing whatever, and then we believe everything again - and, moreover, give reasons why we believe.

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Absolute faith corrupts as absolutely as absolute power.

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All human beings should try to learn before they die what they are running from, and to, and why.

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The main things which seem to me important on their own account, and not merely as means to other things, are knowledge, art, instinctive happiness, and relations of friendship or affection.

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What others think of us would be of little moment did it not, when known, so deeply tinge what we think of ourselves.

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A man is not idle because he is absorbed in thought. There is a visible labor and there is an invisible labor.

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One should always play fairly when one has the winning cards.

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