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Science Quote by Arthur Eddington

"Something unknown is doing, we don't know what"

About this Quote

Science rarely sounds so nakedly human. Eddington’s line, often paraphrased as “something unknown is doing we don’t know what,” is a deliberately comic act of intellectual honesty: a physicist admitting that the universe is busy, consequential, and partially illegible. The phrasing matters. “Something unknown” doubles the ignorance; “doing” gives it agency; “we don’t know what” lands like a shrug that’s also a warning. It’s funny because it’s true, and it’s unsettling because it’s coming from the person you expect to have answers.

The context is early 20th-century physics, when classical certainty was collapsing under relativity and quantum mechanics. Eddington wasn’t a crank in the corner; he was a key translator of Einstein for the English-speaking world and a public-facing authority. So the subtext isn’t anti-science cynicism. It’s a corrective to the swagger of “explaining everything,” a reminder that measurement, models, and equations are tools, not omniscience. Even when the math works, the “what is really going on” can remain opaque.

There’s also a cultural jab at the era’s appetite for tidy narratives. Eddington is marking the boundary between description and understanding: we can predict effects without fully grasping causes, name forces without picturing mechanisms, and still be doing serious, disciplined knowledge-making. The intent is humility with backbone - an invitation to keep investigating without pretending the mystery has been domesticated.

Quote Details

TopicScience
Source
Verified source: The Nature of the Physical World (Arthur Eddington, 1928)
Text match: 95.63%   Provider: Cross-Reference
Evidence:
Something unknown is doing we don’t know what, that is what our theory amounts to. (Page 291). This appears in Arthur S. Eddington's own book based on his Gifford Lectures. The verified wording is longer than the commonly quoted shortened form. In the surrounding passage Eddington writes: "No familiar conceptions can be woven round the electron; it belongs to the waiting list." Then on p. 291 he continues with the quoted sentence. I did not find evidence of an earlier primary-source publication before this 1928 book in the sources checked, so this is the earliest verified primary source I could confirm.
Other candidates (1)
Quantum Language and the Migration of Scientific Concepts (Jennifer Burwell, 2025) compilation95.0%
... Arthur Eddington asserted that “no familiar conception can be woven around the electron,” and that “it belongs to...
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Citation Formats

APA Style (7th ed.)
Eddington, Arthur. (2026, March 11). Something unknown is doing, we don't know what. FixQuotes. https://fixquotes.com/quotes/something-unknown-is-doing-we-dont-know-what-140264/

Chicago Style
Eddington, Arthur. "Something unknown is doing, we don't know what." FixQuotes. March 11, 2026. https://fixquotes.com/quotes/something-unknown-is-doing-we-dont-know-what-140264/.

MLA Style (9th ed.)
"Something unknown is doing, we don't know what." FixQuotes, 11 Mar. 2026, https://fixquotes.com/quotes/something-unknown-is-doing-we-dont-know-what-140264/. Accessed 1 Apr. 2026.

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Something unknown is doing we do not know what - Eddington
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About the Author

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Arthur Eddington (December 28, 1882 - November 22, 1944) was a Scientist from United Kingdom.

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