The destruction of the foundations necessarily brings down the whole edifice.
RENE DESCARTESTo know what people really think, pay attention to what they do, rather than what they say.
More Rene Descartes Quotes
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All that is necessary to right action is right judgment, and to the best action the most correct judgment.
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So far, I have been a spectator in this theatre which is the world, but I am now about to mount the stage, and I come forward masked.
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For I found myself embarrassed with so many doubts and errors that it seemed to me that the effort to instruct myself had no effect other than the increasing discovery of my own ignorance
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I suppose therefore that all things I see are illusions; I believe that nothing has ever existed of everything my lying memory tells me.
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But what then am I? A thing that thinks. What is that? A thing that doubts, understand, affirms, denies, wills, refuses, and that also imagines and senses.
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When it is not in our power to determine what it true, we ought to follow what is most probable.
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I had become aware, as early as my college days, that no opinion, however absurd and incredible can be imagined, that has not been held by one of the philosophers.
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Divide each difficulty into as many parts as is feasible and necessary to resolve it.
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To live without philosophizing is in truth the same as keeping the eyes closed without attempting to open them.
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Common sense is the most widely shared commodity in the world, for every man is convinced that he is well supplied with it.
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I think; therefore I am.
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To think? That’s it. It is thought. This alone cannot be detached from me. I am, I exist; that is certain.
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It is a common failing of mortals to deem the more difficult the fairer.
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Conquer yourself rather than the world.
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Bad books engender bad habits, but bad habits engender good books.
RENE DESCARTES