"Your theory is crazy, but it's not crazy enough to be true"
About this Quote
The intent is less to police eccentricity than to demand higher ambition. A merely odd idea can be wrong in ordinary ways: it tweaks assumptions, keeps the furniture of reality intact, and hopes to win by cleverness. Bohr is pointing at a harsher standard of truth in frontier physics: when you’re up against paradoxes like wave-particle duality or non-classical measurement, a correct theory often has to violate the reader’s intuitions so thoroughly that it sounds like metaphysics or pranksterism. “Not crazy enough” means you haven’t paid the full price of admission.
The subtext is also a social move. In a culture of brilliant rivals - Einstein in the next room, Heisenberg down the hall - Bohr reframes disagreement as a shared hunt rather than a personal defeat. You can be “crazy” and still be invited to the table, as long as your craziness is disciplined by math, evidence, and explanatory reach.
Context matters: early 20th-century physics wasn’t refining Newton; it was replacing him. Bohr’s quip captures that cultural shock - truth, in that moment, didn’t sound reasonable. It sounded impossible, until it worked.
Quote Details
| Topic | Witty One-Liners |
|---|---|
| Source | Later attribution: Why Math Must Replace Science (Mike Hockney, 2014) modern compilationID: JgbzEAAAQBAJ
Evidence:
... Niels Bohr So , science is all about craziness ! But only empiricist craziness . All other craziness is regarded as just , well , crazy . " Your theory is crazy , but it's not crazy enough to be true . ” – Niels Bohr The Copenhagen ... |
| Cite |
Citation Formats
APA Style (7th ed.)
Bohr, Niels. (2026, February 9). Your theory is crazy, but it's not crazy enough to be true. FixQuotes. https://fixquotes.com/quotes/your-theory-is-crazy-but-its-not-crazy-enough-to-16533/
Chicago Style
Bohr, Niels. "Your theory is crazy, but it's not crazy enough to be true." FixQuotes. February 9, 2026. https://fixquotes.com/quotes/your-theory-is-crazy-but-its-not-crazy-enough-to-16533/.
MLA Style (9th ed.)
"Your theory is crazy, but it's not crazy enough to be true." FixQuotes, 9 Feb. 2026, https://fixquotes.com/quotes/your-theory-is-crazy-but-its-not-crazy-enough-to-16533/. Accessed 12 Feb. 2026.








