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René Descartes quotes on truth

2 verified English passages where René Descartes’ thought meets questions of truth.

René Descartes on truth

René Descartes (1596–1650) approaches truth within Rationalism. Methodic doubt strips away uncertain beliefs until the cogito—thinking existence—stands firm. Clear and distinct perception, guaranteed by a non-deceiving God, rebuilds knowledge of mind, God, and material nature. On this page, the archive isolates English passages where that project meets truth most directly—useful for searches such as “rené descartes quotes on truth.”

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Start with the shortest passage, then compare tone across sources. Return to the René Descartes thinker page for biography and to the truth theme for other voices on the same question.

Frequently asked

What did René Descartes say about truth?

The quotations below are the archive’s curated answer: English renderings selected for clarity and attribution, not a complete corpus.

Where else should I read after rené descartes on truth?

Related themes: Self , Knowledge , Freedom , Nature , Reason , Life .

  1. Once in a lifetime, everything must be doubted.
  2. The things we conceive very clearly and very distinctly are all true.