“It is only prudent never to place complete confidence in that by which we have even once been deceived.”

— René Descartes, book Meditations on First Philosophy

Variant: ... it is a mark of prudence never to place our complete trust in those who have deceived us even once.
Source: Meditations on First Philosophy

Last update Jan. 28, 2026. History

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René Descartes47

French philosopher, mathematician, and scientist 1596–1650

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