Rene Descartes — "It is proper to a philosopher to doubt everything, at least once."
It is proper to a philosopher to doubt everything, at least once.
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More from Rene Descartes
"Divide each difficulty into as many parts as is feasible and necessary to resolve it."
"I desire to live in peace and to be useful to all men."
"The reading of all good books is like a conversation with the finest minds of past centuries."
"I am a thinking thing, a substance whose whole essence or nature consists in thinking, and there is no need of any place, nor does it depend on any material thing."
"The whole of philosophy is like a tree, whose roots are metaphysics, whose trunk is physics, and whose branches are all the other sciences."