Doubt is the origin of wisdom.
RENE DESCARTESI am accustomed to sleep and in my dreams to imagine the same things that lunatics imagine when awake.
More Rene Descartes Quotes
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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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For to be possessed of a vigorous mind is not enough; the prime requisite is rightly to apply it.
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Let whoever can do so deceive me, he will never bring it about that I am nothing, so long as I continue to think I am something.
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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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To know what people really think, pay attention to what they do, rather than what they say.
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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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Divide each difficulty into as many parts as is feasible and necessary to resolve it.
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Nothing is made from nothing.
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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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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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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 am accustomed to sleep and in my dreams to imagine the same things that lunatics imagine when awake.
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But in my opinion, all things in nature occur mathematically.
RENE DESCARTES -
It is only prudent never to place complete confidence in that by which we have even once been deceived.
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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.
RENE DESCARTES