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

- March 31, 1596 – February 11, 1650
- French
- Philosopher, Mathematician, Scientist, Father of Modern Philosophy
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Quote
“It is only prudent never to place complete confidence in that by which we have even once been deceived.”
Explanation
In this statement, Descartes reinforces the principle of rational caution, urging us not to fully trust anything that has previously proven unreliable. His argument is rooted in the idea that experience, particularly through the senses, can be deceptive, and therefore should not serve as the absolute basis for our beliefs. Instead, Descartes promotes critical scrutiny and measured skepticism as safeguards against error.
This insight forms a cornerstone of Descartes’ philosophical method, introduced in Meditations on First Philosophy. In the intellectual climate of the 17th century, when traditional authorities and empirical observations were increasingly questioned, Descartes sought to rebuild knowledge from indubitable truths. He argued that even a single instance of deception—such as a mirage or an illusion—justifies withholding full belief in sensory or experiential claims, thus prioritizing clear and distinct ideas derived through reason.
In contemporary settings, this quote has wide relevance, from scientific research to everyday decision-making. Whether evaluating data, navigating interpersonal trust, or questioning media sources, Descartes’ guidance reminds us that a prudent mind demands verification. It is a call for disciplined judgment, where confidence is earned through consistency and clarity, not assumed on the basis of habit or unexamined belief.
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