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Some famous quotes by René Descartes, the French philosopher and mathematician

• “Cogito, ergo sum.” (“I think, therefore I am.”)

• “The preservation of health should be the first study of one who is of any worth to oneself.”

• “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.”

• “The reading of all good books is like a conversation with the finest men of past centuries.”

• “Divide each difficulty into as many parts as is feasible and necessary to resolve it.”

• “It is not enough to possess a good mind; it must be applied.”

• “Except our own thoughts, there is nothing absolutely in our power.”

• “The first precept was never to accept a thing as true until I knew it as such without a single doubt.”

— by René Descartes