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René Descartes - Principles of Philosophy (1644)

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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.
Variant translation: The seeker after truth must, once in the course of his life, doubt everything, as far as is possible.

René Descartes
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The nature of matter, or body considered in general, consists not in its being something which is hard or heavy or coloured, or which affects the senses in any way, but simply in its being something which is extended in length, breadth and depth.

René Descartes
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God always preserves in the world just so much motion as He impressed on it at its first creation.

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I accept no principles of physics which are not also accepted in mathematics...

René Descartes

Quote of the day

What we observe is not nature itself but nature exposed to our method of questioning. Our scientific work in physics consists in asking questions about nature in the language that we possess and trying to get an answer from experiment by the means that are at our disposal.
Werner Heisenberg

René Descartes

René Descartes
Creative Commons

Born: March 31, 1596
Died: February 11, 1650 (aged 53)
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