"The two operations of our understanding, intuition and deduction, on which alone we have said we must rely in the acquisition of knowledge"
About this Quote
The phrasing matters. “Two operations” sounds clinical, almost mechanical, as if the mind were an instrument with only two legitimate settings. That austerity is the subtext: everything else-sense experience, testimony, habit, even rhetorical persuasion-gets demoted to the status of suspect evidence. Intuition here isn’t vibes; it’s the immediate grasp of a “clear and distinct” truth. Deduction is the chain that carries that clarity forward without contamination. Together they mimic geometry: start with axioms you can’t honestly doubt, then build a world.
Context sharpens the intent. Seventeenth-century Europe is cracking open into modern science, but it’s also roiled by theological conflict and epistemic anxiety. Descartes’ project is to find bedrock that survives skepticism and sectarian noise. The irony is that this inward turn, pitched as pure reason, becomes a cultural blueprint: modernity’s faith that the self, disciplined enough, can outthink history. It’s bracing, and a little terrifying, because it makes knowledge feel solitary by design.
Quote Details
| Topic | Reason & Logic |
|---|---|
| Source | Help us find the source |
| Cite |
Citation Formats
APA Style (7th ed.)
Descartes, Rene. (2026, January 18). The two operations of our understanding, intuition and deduction, on which alone we have said we must rely in the acquisition of knowledge. FixQuotes. https://fixquotes.com/quotes/the-two-operations-of-our-understanding-intuition-9871/
Chicago Style
Descartes, Rene. "The two operations of our understanding, intuition and deduction, on which alone we have said we must rely in the acquisition of knowledge." FixQuotes. January 18, 2026. https://fixquotes.com/quotes/the-two-operations-of-our-understanding-intuition-9871/.
MLA Style (9th ed.)
"The two operations of our understanding, intuition and deduction, on which alone we have said we must rely in the acquisition of knowledge." FixQuotes, 18 Jan. 2026, https://fixquotes.com/quotes/the-two-operations-of-our-understanding-intuition-9871/. Accessed 7 Feb. 2026.









