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The greatest productive force is human selfishness.

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Luck is a tag given by the mediocre to account for the accomplishments of genius.

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When you learn, teach. When you get, give.

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Greatness is not in were we stand, but in what direction we are moving. We must sail sometimes with the wind, and somtimes agaisnt it - but sail we must. And not drift, nor lie at anchor.

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He admits there are two sides to every question: his own and the wrong side.

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Think not those faithful who praise all thy words and actions; but those who kindly reprove thy faults.

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Ah, what shall I be at fifty,
should nature keep me alive,
if I find the world so bitter
when I am but twenty-five?

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If you treat an individual as he is, he will remain as he is. But if you treat him as if he were what he ought to be and could be, he will become what he ought and could be.

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Ambition is so powerful a passion in the human breast, that however high we reach we are never satisfied.

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If an injury has to be done to a man it should be so severe that his vengeance need not be feared.

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