"No other question has ever moved so profoundly the spirit of man; no other idea has so fruitfully stimulated his intellect; yet no other concept stands in greater need of clarification than that of the infinite"
About this Quote
The context matters. Hilbert is speaking from the early 20th-century moment when mathematics was trying to harden its foundations. Cantors set theory had opened vast new territory, but also unleashed contradictions that made the whole edifice wobble. So when Hilbert says the infinite has stimulated intellect most fruitfully, he is nodding to the generative power of abstraction: whole branches of analysis, topology, and set theory thrive on it. When he adds that it needs clarification more than any other concept, he is signaling the crisis: naive appeals to infinity were producing paradoxes, and paradox in math is not edgy; it is corrosive.
The subtext is a manifesto for formalization. Hilbert is pushing the idea that fascination is not enough; mathematical awe must be disciplined into axioms, definitions, and proofs. He is also recasting a philosophical problem as a technical one: if infinity is the most potent idea we have, then leaving it vague is intellectual malpractice.
Its a line that sells rigor as ambition. The infinite is not being demoted. Its being put on trial, because only what survives clarification can be trusted to build the future.
Quote Details
| Topic | Deep |
|---|---|
| Source | David Hilbert, "On the Infinite" (German: "Über das Unendliche"), 1925 (commonly cited source of this quotation). |
| Cite |
Citation Formats
APA Style (7th ed.)
Hilbert, David. (2026, January 15). No other question has ever moved so profoundly the spirit of man; no other idea has so fruitfully stimulated his intellect; yet no other concept stands in greater need of clarification than that of the infinite. FixQuotes. https://fixquotes.com/quotes/no-other-question-has-ever-moved-so-profoundly-144587/
Chicago Style
Hilbert, David. "No other question has ever moved so profoundly the spirit of man; no other idea has so fruitfully stimulated his intellect; yet no other concept stands in greater need of clarification than that of the infinite." FixQuotes. January 15, 2026. https://fixquotes.com/quotes/no-other-question-has-ever-moved-so-profoundly-144587/.
MLA Style (9th ed.)
"No other question has ever moved so profoundly the spirit of man; no other idea has so fruitfully stimulated his intellect; yet no other concept stands in greater need of clarification than that of the infinite." FixQuotes, 15 Jan. 2026, https://fixquotes.com/quotes/no-other-question-has-ever-moved-so-profoundly-144587/. Accessed 17 Feb. 2026.







