"Every word or concept, clear as it may seem to be, has only a limited range of applicability"
About this Quote
The intent is partly scientific hygiene. Early 20th-century physics broke the illusion that old categories like “particle,” “wave,” “position,” and “trajectory” were neutral labels. They worked beautifully in everyday scales and in classical mechanics, then started lying at the quantum level. Heisenberg’s point isn’t that words are useless; it’s that they’re tools calibrated for specific regimes. Ask them to do work outside their design specs and they don’t merely get fuzzy - they mislead.
The subtext cuts wider than physics. It’s a critique of intellectual swagger: people love concepts that feel “clear” because clarity reads as authority. Heisenberg flips that instinct. Clarity is often just familiarity plus a stable context. Change the context - new measurements, new scales, new systems - and the apparent solidity of a concept reveals its boundaries.
Context matters: this is the era when measurement stopped being a passive act and became part of the phenomenon. If observing helps define what’s observed, then the language of “what is” can’t pretend it’s unlimited. Heisenberg offers humility as rigor: know not only what your ideas explain, but where they stop.
Quote Details
| Topic | Wisdom |
|---|---|
| Source | Help us find the source |
| Cite | Cite this Quote |
Citation Formats
APA Style (7th ed.)
Heisenberg, Werner. (2026, January 15). Every word or concept, clear as it may seem to be, has only a limited range of applicability. FixQuotes. https://fixquotes.com/quotes/every-word-or-concept-clear-as-it-may-seem-to-be-117422/
Chicago Style
Heisenberg, Werner. "Every word or concept, clear as it may seem to be, has only a limited range of applicability." FixQuotes. January 15, 2026. https://fixquotes.com/quotes/every-word-or-concept-clear-as-it-may-seem-to-be-117422/.
MLA Style (9th ed.)
"Every word or concept, clear as it may seem to be, has only a limited range of applicability." FixQuotes, 15 Jan. 2026, https://fixquotes.com/quotes/every-word-or-concept-clear-as-it-may-seem-to-be-117422/. Accessed 3 Feb. 2026.



