The long chains of simple and easy reasonings by means of which geometers are accustomed to reach the conclusions of their most difficult demonstrations, had led me to imagine that all things, the knowledge of which is open to man, are similarly dependent one upon another.
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"It is a mark of a truly great mind to be able to make a great discovery with few means."
"The custom of believing what others believe, and of doing what others do, is the most powerful obstacle to the discovery of truth."
"I desire to live in peace and to be useful to all men."
"It is not enough to have a good mind; the main thing is to use it well."
"Whenever anyone has offended me, I try to raise my soul so high that the offense cannot reach it."
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