---
title: "24 Theory Quotes By Arthur Eddington"
description: "24 Theory quotes by Arthur Eddington. Plus more from Arthur Eddington and more Theory sayings from other authors."
image: "https://sms4smile.com/quotes/i/594/arthur-eddington-8366_believe_don-t-believe-the-results-of-experiments_349151.png"
---

> [Don't believe the results of experiments until they're confirmed by theory.](https://sms4smile.com/quotes/arthur-eddington/don-t-believe-the-results-of-experiments-until-they-re-confirmed-by/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/594/arthur-eddington-8366_believe_don-t-believe-the-results-of-experiments_349151.png)

> [Schrodinger's wave-mechanics is not a physical theory but a dodge-and a very good dodge too.](https://sms4smile.com/quotes/arthur-eddington/schrodinger-s-wave-mechanics-is-not-a-physical-theory-but-a-dodge-and/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/6f1/arthur-eddington-8366_dodge_schrodinger-s-wave-mechanics-is-not-a-ph_3059832.png)

> [Something unknown is doing we don't know what-that is what our theory amounts to.](https://sms4smile.com/quotes/arthur-eddington/something-unknown-is-doing-we-don-t-know-what-that-is-what-our-theory/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/c5d/arthur-eddington-8366_amount_something-unknown-is-doing-we-don-t-know_1442311.png)

> [Do not put too much confidence in experimental results until they have been confirmed by theory.](https://sms4smile.com/quotes/arthur-eddington/do-not-put-too-much-confidence-in-experimental-results-until-they/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/944/arthur-eddington-8366_confidence_do-not-put-too-much-confidence-in-experi_2884039.png)

> [Never accept a fact until it has been verified by theory.](https://sms4smile.com/quotes/arthur-eddington/never-accept-a-fact-until-it-has-been-verified-by-theory/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/ddb/arthur-eddington-8366_accepting_never-accept-a-fact-until-it-has-been-ve_3013495.png)

> [In the most modern theories of physics probability seems to have replaced aether as "the nominative of the verb 'to undulate'."](https://sms4smile.com/quotes/arthur-eddington/in-the-most-modern-theories-of-physics-probability-seems-to-have/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/ec2/arthur-eddington-8366_aether_in-the-most-modern-theories-of-physics-p_1345013.png)

> [ On one occasion when \[William\] Smart found him engrossed with his fundamental theory, he asked Eddington how many people he thought would… ](https://sms4smile.com/quotes/arthur-eddington/on-one-occasion-when-william-smart-found-him-engrossed-with-his/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/1f1/arthur-eddington-8366_found_on-one-occasion-when-william-smart-found_2833165.png)

> [I don't believe any experiment until it is confirmed by theory. I find this is a witty inversion of "conventional" wisdom.](https://sms4smile.com/quotes/arthur-eddington/i-don-t-believe-any-experiment-until-it-is-confirmed-by-theory-i-find/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/cb5/arthur-eddington-8366_believe_i-don-t-believe-any-experiment-until-it_966656.png)

> [ \[When thinking about the new relativity and quantum theories\] I have felt a homesickness for the paths of physical science where there… ](https://sms4smile.com/quotes/arthur-eddington/when-thinking-about-the-new-relativity-and-quantum-theories-i-have/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/530/arthur-eddington-8366_felt_when-thinking-about-the-new-relativity-a_674760.png)

> [There was a time when we wanted to be told what an electron is. The question was never answered. No familiar conceptions…](https://sms4smile.com/quotes/arthur-eddington/there-was-a-time-when-we-wanted-to-be-told-what-an-electron-is-the/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/888/arthur-eddington-8366_conception_there-was-a-time-when-we-wanted-to-be-to_452747.png)

> [In Einstein's theory of relativity the observer is a man who sets out in quest of truth armed with a measuring-rod. In…](https://sms4smile.com/quotes/arthur-eddington/in-einstein-s-theory-of-relativity-the-observer-is-a-man-who-sets-out/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/57a/arthur-eddington-8366_einstein_in-einstein-s-theory-of-relativity-the-o_1078394.png)

> [If your theory is found to be against the second law of thermodynamics I give you no hope; there is nothing for…](https://sms4smile.com/quotes/arthur-eddington/if-your-theory-is-found-to-be-against-the-second-law-of/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/9a8/arthur-eddington-8366_collapse_if-your-theory-is-found-to-be-against-th_611630.png)

> [The idea of a universal mind or Logos would be, I think, a fairly plausible inference from the present state of scientific…](https://sms4smile.com/quotes/arthur-eddington/the-idea-of-a-universal-mind-or-logos-would-be-i-think-a-fairly/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/6c1/arthur-eddington-8366_design_the-idea-of-a-universal-mind-or-logos-wo_2107503.png)

> [There is only one law of Nature-the second law of thermodynamics-which recognises a distinction between past and future more profound than the…](https://sms4smile.com/quotes/arthur-eddington/there-is-only-one-law-of-nature-the-second-law-of-thermodynamics/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/b9a/arthur-eddington-8366_aloof_there-is-only-one-law-of-nature-the-seco_1596905.jpg)

> [We have found that where science has progressed the farthest, the mind has but regained from nature that which the mind has…](https://sms4smile.com/quotes/arthur-eddington/we-have-found-that-where-science-has-progressed-the-farthest-the-mind/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/94f/arthur-eddington-8366_accounts_we-have-found-that-where-science-has-pro_2295663.jpg)

> [If someone points out to you that your pet theory of the universe is in disagreement with Maxwell's equations-then so much the…](https://sms4smile.com/quotes/arthur-eddington/if-someone-points-out-to-you-that-your-pet-theory-of-the-universe-is/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/ac3/arthur-eddington-8366_collapse_if-someone-points-out-to-you-that-your-p_2707579.png)

> [Observation and theory get on best when they are mixed together, both helping one another in the pursuit of truth. It is…](https://sms4smile.com/quotes/arthur-eddington/observation-and-theory-get-on-best-when-they-are-mixed-together-both/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/346/arthur-eddington-8366_add_observation-and-theory-get-on-best-when_5766.png)

> [But it is necessary to insist more strongly than usual that what I am putting before you is a model-the Bohr model…](https://sms4smile.com/quotes/arthur-eddington/but-it-is-necessary-to-insist-more-strongly-than-usual-that-what-i-am/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/439/arthur-eddington-8366_atoms_but-it-is-necessary-to-insist-more-stron_1316175.png)

> [When an investigator has developed a formula which gives a complete representation of the phenomena within a certain range, he may be…](https://sms4smile.com/quotes/arthur-eddington/when-an-investigator-has-developed-a-formula-which-gives-a-complete/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/2ee/arthur-eddington-8366_certain_when-an-investigator-has-developed-a-for_1153189.jpg)

> [“The law that entropy always increases holds, I think, the supreme position among the laws of Nature. If someone points out to…](https://sms4smile.com/quotes/arthur-eddington/the-law-that-entropy-always-increases-holds-i-think-the-supreme-2/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/622/arthur-eddington-8366_entropy_the-law-that-entropy-always-increases-ho_1070653.png)

> [An electron is no more (and no less) hypothetical than a star. Nowadays we count electrons one by one in a Geiger…](https://sms4smile.com/quotes/arthur-eddington/an-electron-is-no-more-and-no-less-hypothetical-than-a-star-nowadays/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/066/arthur-eddington-8366_electron_an-electron-is-no-more-and-no-less-hypot_2449275.png)

> [The electron, as it leaves the atom, crystallises out of Schrödinger's mist like a genie emerging from his bottle.](https://sms4smile.com/quotes/arthur-eddington/the-electron-as-it-leaves-the-atom-crystallises-out-of-schr-dinger-s/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/389/arthur-eddington-8366_atoms_the-electron-as-it-leaves-the-atom-cryst_2518371.png)

> [It is also a good rule not to put overmuch confidence in the observational results that are put forward until they are…](https://sms4smile.com/quotes/arthur-eddington/it-is-also-a-good-rule-not-to-put-overmuch-confidence-in-the/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/889/arthur-eddington-8366_confidence_it-is-also-a-good-rule-not-to-put-overmu_3225842.jpg)

> [Electrical force is defined as something which causes motion of electrical charge; an electrical charge is something which exerts electric force.](https://sms4smile.com/quotes/arthur-eddington/electrical-force-is-defined-as-something-which-causes-motion-of/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

[Image](https://sms4smile.com/quotes/i/536/arthur-eddington-8366_causes_electrical-force-is-defined-as-something_1582857.png)

## Other authors on Theory

## More by Arthur Eddington

> [Observation and theory get on best when they are mixed together, both helping one another in the pursuit of truth. It is a good…](https://sms4smile.com/quotes/arthur-eddington/observation-and-theory-get-on-best-when-they-are-mixed-together-both/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

> [Proof is an idol before which the mathematician tortures himself.](https://sms4smile.com/quotes/arthur-eddington/proof-is-an-idol-before-which-the-mathematician-tortures-himself/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

> [It is one thing for the human mind to extract from the phenomena of nature the laws which it has itself put into them;…](https://sms4smile.com/quotes/arthur-eddington/it-is-one-thing-for-the-human-mind-to-extract-from-the-phenomena-of/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

> [Don't believe the results of experiments until they're confirmed by theory.](https://sms4smile.com/quotes/arthur-eddington/don-t-believe-the-results-of-experiments-until-they-re-confirmed-by/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

> [Probably the simplest hypothesis... is that there may be a slow process of annihilation of matter.](https://sms4smile.com/quotes/arthur-eddington/probably-the-simplest-hypothesis-is-that-there-may-be-a-slow-process/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

> [There was a time when we wanted to be told what an electron is. The question was never answered. No familiar conceptions can be…](https://sms4smile.com/quotes/arthur-eddington/there-was-a-time-when-we-wanted-to-be-told-what-an-electron-is-the/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

> [To the pure geometer the radius of curvature is an incidental characteristic - like the grin of the Cheshire cat. To the physicist it…](https://sms4smile.com/quotes/arthur-eddington/to-the-pure-geometer-the-radius-of-curvature-is-an-incidental/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

> [Shuffling is the only thing which Nature cannot undo.](https://sms4smile.com/quotes/arthur-eddington/shuffling-is-the-only-thing-which-nature-cannot-undo/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

> [The universe will finally become a ball of radiation, becoming more and more rarified and passing into longer and longer wave-lengths. The longest waves…](https://sms4smile.com/quotes/arthur-eddington/the-universe-will-finally-become-a-ball-of-radiation-becoming-more/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

> [Science is one thing, wisdom is another. Science is an edged tool, with which men play like children, and cut their own fingers.](https://sms4smile.com/quotes/arthur-eddington/science-is-one-thing-wisdom-is-another-science-is-an-edged-tool-with/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

> [We often think that when we have completed our study of one we know all about two, because 'two' is 'one and one.' We…](https://sms4smile.com/quotes/arthur-eddington/we-often-think-that-when-we-have-completed-our-study-of-one-we-know/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

> [If your theory is found to be against the second law of thermodynamics I give you no hope; there is nothing for it but…](https://sms4smile.com/quotes/arthur-eddington/if-your-theory-is-found-to-be-against-the-second-law-of/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

> [Human life is proverbially uncertain; few things are more certain than the solvency of a life-insurance company.](https://sms4smile.com/quotes/arthur-eddington/human-life-is-proverbially-uncertain-few-things-are-more-certain-than/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

> [ \[When thinking about the new relativity and quantum theories\] I have felt a homesickness for the paths of physical science where there are ore… ](https://sms4smile.com/quotes/arthur-eddington/when-thinking-about-the-new-relativity-and-quantum-theories-i-have/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

> [There is no space without aether, and no aether which does not occupy space.](https://sms4smile.com/quotes/arthur-eddington/there-is-no-space-without-aether-and-no-aether-which-does-not-occupy/)

[Arthur Eddington](https://sms4smile.com/quotes/author/arthur-eddington/)

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                        "text": "On one occasion when [William] Smart found him engrossed with his fundamental theory, he asked Eddington how many people he thought would understand what he was writing-after a pause came the reply, 'Perhaps seven.'",
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                        "text": "There was a time when we wanted to be told what an electron is. The question was never answered. No familiar conceptions can be woven around the electron; it belongs to the waiting list.",
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                        "text": "There is only one law of Nature-the second law of thermodynamics-which recognises a distinction between past and future more profound than the difference of plus and minus. It stands aloof from all the rest. ... It opens up a new province of knowledge, namely, the study of organisation; and it is in connection with organisation that a direction of time-flow and a distinction between doing and undoing appears for the first time.",
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                        "text": "We have found that where science has progressed the farthest, the mind has but regained from nature that which the mind has put into nature. We have found a strange foot-print on the shores of the unknown. We have devised profound theories, one after another, to account for its origin. At last, we have succeeded in reconstructing the creature that made the foot-print. And Lo! it is our own.",
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                        "text": "If someone points out to you that your pet theory of the universe is in disagreement with Maxwell's equations-then so much the worse for Maxwell's equations. If it is found to be contradicted by observation-well these experimentalists do bungle things sometimes. But if your theory is found to be against the second law of thermodynamics I can give you no hope; there is nothing for it but to collapse in deepest humiliation.",
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                        "text": "Observation and theory get on best when they are mixed together, both helping one another in the pursuit of truth. It is a good rule not to put overmuch confidence in a theory until it has been confirmed by observation. I hope I shall not shock the experimental physicists too much if I add that it is also a good rule not to put overmuch confidence in the observational results that are put forward until they have been confirmed by theory.",
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                        "text": "But it is necessary to insist more strongly than usual that what I am putting before you is a model-the Bohr model atom-because later I shall take you to a profounder level of representation in which the electron instead of being confined to a particular locality is distributed in a sort of probability haze all over the atom.",
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                        "text": "“The law that entropy always increases holds, I think, the supreme position among the laws of Nature. If someone points out to you that your pet theory of the universe is in disagreement with Maxwell's equations - then so much the worse for Maxwell's equations. If it is found to be contradicted by observation - well, these experimentalists do bungle things sometimes. But if your theory is found to be against the Second Law of Thermodynamics I can give you no hope; there is nothing for it to collapse in deepest humiliation.”",
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                        "text": "An electron is no more (and no less) hypothetical than a star. Nowadays we count electrons one by one in a Geiger counter, as we count the stars one by one on a photographic plate.",
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