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René Descartes

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René Descartes

René Descartes (March 31, 1596 – February 11, 1650) was an important French philosopher, mathematician, scientist, and writer. Some people also call him Cartesius.

Sourced quotes

  • "Dubium sapientiae initium."[1]
English: Doubt is the origin of wisdom.
What it means: When you have doubt you become wiser.
  • "Cogito, ergo sum."[2]
English: I think, therefore I am.
What it means: You exist because you think.
  • "Ex nihilo nihil fit."[2]
English: Nothing comes out of nothing.
What it means: If you do not do anything, nothing happens.


  1. Meditationes de prima philosophiae (Meditations on First Philosophy) (1641)
  2. 2.0 2.1 Principia philosophiae (Principles of Philosophy) (1644)

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