Common sense is not so common.

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  Doubt is not a pleasant condition, but certainty is absurd.

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  The best is the enemy of the good.

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  Work keeps at bay three great evils: boredom, vice and need.

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  Self-respect: the secure feeling that no one, as yet, is suspicious.

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  It is hard to believe that a man is telling the truth when you know that you would lie if you were in his place.

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  It is a sin to believe evil of others, but it is seldom a mistake.

All aphorisms