To know what people really think, pay regard to what they do, rather than what they say.
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The reading of all good books is like a conversation with all the finest men of past centuries.
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Nothing is more fairly distributed than common sense: no one thinks he needs more of it than he already has.
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If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.
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Whenever anyone has offended me, I try to raise my soul so high that the offense cannot reach it.
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It is not enough to have a good mind, the main thing is to use it well.
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There is nothing so strange and so unbelievable that it has not been said by one philosopher or another.
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Everything is self-evident.
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Divide each difficulty into as many parts as is feasible and necessary to resolve it.
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Except our own thoughts, there is nothing absolutely in our power.
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I think therefore I am.
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Descartes, Rene

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11 quotations