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When you have faults, do not fear to abandon them.

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Success depends upon previous preparation, and without such preparation there is sure to be failure.

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Don’t grieve when people fail to recognize your ability. Grieve for your lack of ability instead.

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If a craftsman wants to do good work, he must first sharpen his tools.

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The noble-minded worry about their lack of ability, not about people’s failure to recognize their ability.