Rene Descartes — "The two operations of our understanding, intuition and deduction, on which alone…"
The two operations of our understanding, intuition and deduction, on which alone we have said we must rely in the acquisition of knowledge.
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More from Rene Descartes
"I desire to live in peace and to continue the life I have begun, adopting as my motto 'to live well, one must live concealed'."
"The greatest good is to live without pain."
"The whole of philosophy is like a tree, whose roots are metaphysics, whose trunk is physics, and whose branches are all the other sciences."
"I suppose therefore that all the things I see are false imaginations; I believe that nothing ever existed of all that my fallacious memory represents to me."
"To be able to live without fear, without anxiety, without sadness, and without any other passion which could disturb the tranquillity of the soul."