Rene Descartes — "To be a good philosopher, one must be a good mathematician."
To be a good philosopher, one must be a good mathematician.
To be a good philosopher, one must be a good mathematician.
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"I am a thinking substance, that is, a mind, or soul, or intellect, or reason."
"To know what is true is to know what is good."
"I have never had any experience that was not accompanied by some thought."
"The first precept was never to accept anything for true which I did not clearly know to be such."
"The mind is a substance whose whole essence or nature consists only of thinking."
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