For to be possessed of a vigorous mind is not enough; the prime requisite is rightly to apply it.
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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The first precept was never to accept a thing as true until I knew it as such without a single doubt
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Divide each difficulty into as many parts as is feasible and necessary to resolve it.
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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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In order to seek truth, it is necessary once in the course of our life to doubt, as far as possible, of all things
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Conquer yourself rather than the world.
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Each problem that I solved became a rule which served afterwards to solve other problems.
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In order to improve the mind, we ought less to learn than to contemplate.
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The reading of all good books is like conversation with the finest men of past centuries.
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The destruction of the foundations necessarily brings down the whole edifice.
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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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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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Whenever anyone has offended me, I try to raise my soul so high that the offense cannot reach it.
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Except our own thoughts, there is nothing absolutely in our power.
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Am I so tied to a body and senses that I am incapable of existing without them?
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For the very fact that my knowledge is increasing little by little is the most certain argument for its imperfection.
RENE DESCARTES






