--- title: "Meaning & Key Takeaway of: The Danish physicist and Nobel Prize…" description: "\"“The Danish physicist and Nobel Prize winner Niels Bohr defined an expert as follows: ‘An expert is a man who has made all the mistakes which can be ma..." image: "https://sms4smile.com/quotes/i/c46/emma-sadleir-59474_bohr_the-danish-physicist-and-nobel-prize-win_786662.jpg" --- # The Danish physicist and Nobel Prize winner Niels Bohr… ![“The Danish physicist and Nobel Prize winner Niels Bohr defined an expert as follows: ‘An expert is a man who has made all the mistakes which can be made.” quote by Emma Sadleir](https://sms4smile.com/quotes/i/c46/emma-sadleir-59474_bohr_the-danish-physicist-and-nobel-prize-win_786662.jpg) [Download](https://sms4smile.com/quotes/i/c46/emma-sadleir-59474_bohr_the-danish-physicist-and-nobel-prize-win_786662.jpg) [Open image](https://sms4smile.com/quotes/i/c46/emma-sadleir-59474_bohr_the-danish-physicist-and-nobel-prize-win_786662.jpg) > ““The Danish physicist and Nobel Prize winner Niels Bohr defined an expert as follows: ‘An expert is a man who has made all the mistakes which can be made.”” [Emma Sadleir](https://sms4smile.com/quotes/author/emma-sadleir/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. Expertise emerges from learning through trial and error, not from avoiding mistakes. **In simple terms:** Mistakes are essential to mastery. Key Takeaway Embrace errors as learning tools. Themes learning expertise mistakes Mood inspirational analytical Type educational motivational When to use this quote - training programs - career development - scientific research - personal growth Key Concepts cognitive science skill acquisition Questions to Reflect On - What mistakes have taught you the most? - How can you balance risk and safety? A Different Perspective Overemphasis on mistakes can discourage risk‑taking. ★ ★ ★ ★ ★ No ratings yet [Bohr](https://sms4smile.com/quotes/about/bohr/) [Bohr Defined](https://sms4smile.com/quotes/about/bohr-defined-6050961/) [Defined Expert](https://sms4smile.com/quotes/about/defined-expert-6050960/) [Expert](https://sms4smile.com/quotes/about/expert/) [Expert Man](https://sms4smile.com/quotes/about/expert-man-371305/) [Niels Bohr](https://sms4smile.com/quotes/about/niels-bohr/) [Nobel prize](https://sms4smile.com/quotes/about/nobel-prize/) ## Related quotes > [“On his journey home from delivering his acceptance speech in Sweden the following summer, Einstein stopped in Copenhagen to see Bohr, who met him…](https://sms4smile.com/quotes/walter-isaacson/on-his-journey-home-from-delivering-his-acceptance-speech-in-sweden/) [Walter Isaacson](https://sms4smile.com/quotes/author/walter-isaacson/) > [“Looking at the waves scudding outwards and getting lost on the horizon, he could not help but recall the words of his mentor, the…](https://sms4smile.com/quotes/benjam-n-labatut/looking-at-the-waves-scudding-outwards-and-getting-lost-on-the/) [Benjamín Labatut](https://sms4smile.com/quotes/author/benjam-n-labatut/) > [ Nobody knows how the stand of our knowledge about the atom would be without him. Personally, \[Niels\] Bohr is one of the amiable colleagues… ](https://sms4smile.com/quotes/albert-einstein/nobody-knows-how-the-stand-of-our-knowledge-about-the-atom-would-be/) [Albert Einstein](https://sms4smile.com/quotes/author/albert-einstein/) > [“I have chosen to talk about one of the founder fathers of twentieth-century physics, Niels Bohr, because in both these respects he was a…](https://sms4smile.com/quotes/jacob-bronowski/i-have-chosen-to-talk-about-one-of-the-founder-fathers-of-twentieth/) [Jacob Bronowski](https://sms4smile.com/quotes/author/jacob-bronowski/) > [ I did not like the man \[Niels Bohr\] when you showed him to me, with his hair all overhis head. ](https://sms4smile.com/quotes/winston-churchill/i-did-not-like-the-man-niels-bohr-when-you-showed-him-to-me-with-his/) [Winston Churchill](https://sms4smile.com/quotes/author/winston-churchill/) > [ “When \[Niels\] Bohr is about everything is somehow different. Even the dullest gets a fit of brilliancy.” ](https://sms4smile.com/quotes/isidor-isaac-rabi/when-niels-bohr-is-about-everything-is-somehow-different-even-the/) [Isidor Isaac Rabi](https://sms4smile.com/quotes/author/isidor-isaac-rabi/) > [“One of the leading figures in quantum physics, Niels Bohr, would sometimes tell his students, “The problem with your idea is not that it…](https://sms4smile.com/quotes/anonymous/one-of-the-leading-figures-in-quantum-physics-niels-bohr-would/) [Anonymous](https://sms4smile.com/quotes/author/anonymous/) > [A visitor to Niels Bohr's country cottage, noticing a horseshoe hanging on the wall, teasing the eminent scientist about this ancient superstition. "Can it…](https://sms4smile.com/quotes/niels-bohr/a-visitor-to-niels-bohr-s-country-cottage-noticing-a-horseshoe/) [Niels Bohr](https://sms4smile.com/quotes/author/niels-bohr/) > [“And at that age, the only boys I didn’t think were gross were dead scientists – and it’s not like I wanted to kiss…](https://sms4smile.com/quotes/sarah-cross/and-at-that-age-the-only-boys-i-didn-t-think-were-gross-were-dead/) [Sarah Cross](https://sms4smile.com/quotes/author/sarah-cross/) > [Somebody once asked Niels Bohr why he had a horseshoe hanging above the front door of his house. Surely you, a world famous physicist,…](https://sms4smile.com/quotes/arthur-koestler/somebody-once-asked-niels-bohr-why-he-had-a-horseshoe-hanging-above/) [Arthur Koestler](https://sms4smile.com/quotes/author/arthur-koestler/) > [“If quantum mechanics hasn’t profoundly shocked you, you haven’t understood it yet,” the Danish Nobel physicist Niels Bohr once said.”](https://sms4smile.com/quotes/satya-nadella/if-quantum-mechanics-hasn-t-profoundly-shocked-you-you-haven-t/) [Satya Nadella](https://sms4smile.com/quotes/author/satya-nadella/) > [This is the most important joke I've ever heard. Niels Bohr, the founder of Quantum Physics, had a friend to dinner. As the friend…](https://sms4smile.com/quotes/john-cleese/this-is-the-most-important-joke-i-ve-ever-heard-niels-bohr-the/) [John Cleese](https://sms4smile.com/quotes/author/john-cleese/) > [“Niels Bohr, the great Dane of quantum physics, was fond of saying, "It is wrong to think that the task of physics is to…](https://sms4smile.com/quotes/david-mitchell/niels-bohr-the-great-dane-of-quantum-physics-was-fond-of-saying-it-is/) [David Mitchell](https://sms4smile.com/quotes/author/david-mitchell/) > [ \[About the great synthesis of atomic physics in the 1920s:\] It was a heroic time. It was not the doing of any one man;… ](https://sms4smile.com/quotes/j-robert-oppenheimer/about-the-great-synthesis-of-atomic-physics-in-the-1920s-it-was-a/) [J. Robert Oppenheimer](https://sms4smile.com/quotes/author/j-robert-oppenheimer/) > [ “\[On famous Nobel Laureate Niels Bohr\] \[Niels\] Bohr's sort of humor, use of parables and stories, tolerance, dependence on family, feelings of indebtedness, obligation,… ](https://sms4smile.com/quotes/finn-aaserud/on-famous-nobel-laureate-niels-bohr-niels-bohr-s-sort-of-humor-use-of/) [Finn Aaserud](https://sms4smile.com/quotes/author/finn-aaserud/) ## More by Emma Sadleir > [“As Dr Seuss said, ‘Those who matter don’t mind, and those who mind don’t matter.’ It does not need to have happened on Instagram.”](https://sms4smile.com/quotes/emma-sadleir/as-dr-seuss-said-those-who-matter-don-t-mind-and-those-who-mind-don-t/) [Emma Sadleir](https://sms4smile.com/quotes/author/emma-sadleir/) > [“When people realise that you are out there, living your life and not documenting it, they will want to live theirs, too.”](https://sms4smile.com/quotes/emma-sadleir/when-people-realise-that-you-are-out-there-living-your-life-and-not/) [Emma Sadleir](https://sms4smile.com/quotes/author/emma-sadleir/) > [“When another person makes you suffer, it is because he suffers deeply within himself, and his suffering is spilling over. He does not need…](https://sms4smile.com/quotes/emma-sadleir/when-another-person-makes-you-suffer-it-is-because-he-suffers-deeply-3/) [Emma Sadleir](https://sms4smile.com/quotes/author/emma-sadleir/) > [“If it’s not your story to tell, you don’t tell it.’ – Iyanla Vanzant”](https://sms4smile.com/quotes/emma-sadleir/if-it-s-not-your-story-to-tell-you-don-t-tell-it-iyanla-vanzant/) [Emma Sadleir](https://sms4smile.com/quotes/author/emma-sadleir/) [Explore all 5 Emma Sadleir quotes ](https://sms4smile.com/quotes/author/emma-sadleir/) ## More Bohr quotes > [“On his journey home from delivering his acceptance speech in Sweden the following summer, Einstein stopped in Copenhagen to see Bohr, who met him…](https://sms4smile.com/quotes/walter-isaacson/on-his-journey-home-from-delivering-his-acceptance-speech-in-sweden/) [Walter Isaacson](https://sms4smile.com/quotes/author/walter-isaacson/) > [ \[About the great synthesis of atomic physics in the 1920s:\] It was a heroic time. It was not the doing of any one man;… ](https://sms4smile.com/quotes/j-robert-oppenheimer/about-the-great-synthesis-of-atomic-physics-in-the-1920s-it-was-a/) [J. Robert Oppenheimer](https://sms4smile.com/quotes/author/j-robert-oppenheimer/) > [“Niels Bohr, the great Dane of quantum physics, was fond of saying, "It is wrong to think that the task of physics is to…](https://sms4smile.com/quotes/david-mitchell/niels-bohr-the-great-dane-of-quantum-physics-was-fond-of-saying-it-is/) [David Mitchell](https://sms4smile.com/quotes/author/david-mitchell/) > [Chemistry, until my childhood, not that long ago, was regarded as a calculating device. Because you couldn't reduce to physics. So it's just some…](https://sms4smile.com/quotes/noam-chomsky/chemistry-until-my-childhood-not-that-long-ago-was-regarded-as-a/) [Noam Chomsky](https://sms4smile.com/quotes/author/noam-chomsky/) > [“Fermi turned to Bohr with weary eyes and a slanted smile, and shrugged. “So we thought we had discovered new elements. We even named…](https://sms4smile.com/quotes/gregory-benford/fermi-turned-to-bohr-with-weary-eyes-and-a-slanted-smile-and-shrugged/) [Gregory Benford](https://sms4smile.com/quotes/author/gregory-benford/) > [“I remember discussions with Bohr which went through many hours till very late at night and ended almost in despair; and when at the…](https://sms4smile.com/quotes/werner-heisenberg/i-remember-discussions-with-bohr-which-went-through-many-hours-till/) [Werner Heisenberg](https://sms4smile.com/quotes/author/werner-heisenberg/) > [“...surprised at seeing a horse-shoe above the door of Bohr’s country house, a fellow scientist exclaimed that he did not share the superstitious belief…](https://sms4smile.com/quotes/slavoj-i-ek/surprised-at-seeing-a-horse-shoe-above-the-door-of-bohr-s-country/) [Slavoj Žižek](https://sms4smile.com/quotes/author/slavoj-i-ek/) > [This is the most important joke I've ever heard. Niels Bohr, the founder of Quantum Physics, had a friend to dinner. As the friend…](https://sms4smile.com/quotes/john-cleese/this-is-the-most-important-joke-i-ve-ever-heard-niels-bohr-the/) [John Cleese](https://sms4smile.com/quotes/author/john-cleese/) > [“If quantum mechanics hasn’t profoundly shocked you, you haven’t understood it yet,” the Danish Nobel physicist Niels Bohr once said.”](https://sms4smile.com/quotes/satya-nadella/if-quantum-mechanics-hasn-t-profoundly-shocked-you-you-haven-t/) [Satya Nadella](https://sms4smile.com/quotes/author/satya-nadella/) > [Somebody once asked Niels Bohr why he had a horseshoe hanging above the front door of his house. Surely you, a world famous physicist,…](https://sms4smile.com/quotes/arthur-koestler/somebody-once-asked-niels-bohr-why-he-had-a-horseshoe-hanging-above/) [Arthur Koestler](https://sms4smile.com/quotes/author/arthur-koestler/) > [Bohr's influence on the physics and the physicists of our century was stronger than that of anyone else, even than that of Albert Einstein.](https://sms4smile.com/quotes/werner-heisenberg/bohr-s-influence-on-the-physics-and-the-physicists-of-our-century-was/) [Werner Heisenberg](https://sms4smile.com/quotes/author/werner-heisenberg/) > [“We walked up and down in the snow, I on skis and she on foot ( she said and proved that she could get…](https://sms4smile.com/quotes/otto-robert-frisch/we-walked-up-and-down-in-the-snow-i-on-skis-and-she-on-foot-she-said/) [Otto Robert Frisch](https://sms4smile.com/quotes/author/otto-robert-frisch/) > [ “Planck...and Bohr...have invented systems containing electrons of which the motion produces no effect upon external charges...\[N\]ot only \[is this\] inconsistent with the accepted laws… ](https://sms4smile.com/quotes/g-n-lewis/planck-and-bohr-have-invented-systems-containing-electrons-of-which/) [G.N.Lewis](https://sms4smile.com/quotes/author/g-n-lewis/) > [“And at that age, the only boys I didn’t think were gross were dead scientists – and it’s not like I wanted to kiss…](https://sms4smile.com/quotes/sarah-cross/and-at-that-age-the-only-boys-i-didn-t-think-were-gross-were-dead/) [Sarah Cross](https://sms4smile.com/quotes/author/sarah-cross/) > [“Bohr is really doing what the Stoic allegorists did to close the gap between their world and Homer's, or what St. Augustine did when…](https://sms4smile.com/quotes/frank-kermode/bohr-is-really-doing-what-the-stoic-allegorists-did-to-close-the-gap/) [Frank Kermode](https://sms4smile.com/quotes/author/frank-kermode/) [Browse all 42 Bohr quotes ](https://sms4smile.com/quotes/about/bohr/) ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Quotation", "text": "“The Danish physicist and Nobel Prize winner Niels Bohr defined an expert as follows: ‘An expert is a man who has made all the mistakes which can be made.”", "creator": { "@type": "Person", "name": "Emma Sadleir" }, "isPartOf": { "@id": "https://sms4smile.com/quotes/#website" }, "url": "https://sms4smile.com/quotes/emma-sadleir/the-danish-physicist-and-nobel-prize-winner-niels-bohr-defined-an/", "about": { "@type": "Thing", "name": "Bohr" }, "@id": "https://sms4smile.com/quotes/emma-sadleir/the-danish-physicist-and-nobel-prize-winner-niels-bohr-defined-an/#quotation", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/c46/emma-sadleir-59474_bohr_the-danish-physicist-and-nobel-prize-win_786662.jpg", "contentUrl": "https://sms4smile.com/quotes/i/c46/emma-sadleir-59474_bohr_the-danish-physicist-and-nobel-prize-win_786662.jpg", "url": "https://sms4smile.com/quotes/i/c46/emma-sadleir-59474_bohr_the-danish-physicist-and-nobel-prize-win_786662.jpg", "width": 1080, "height": 1080, "caption": "“The Danish physicist and Nobel Prize winner Niels Bohr defined an expert as follows: ‘An expert is a man who…” — Emma Sadleir", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } }, { "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://sms4smile.com/" }, { "@type": "ListItem", "position": 2, "name": "Quotes", "item": "https://sms4smile.com/quotes/" }, { "@type": "ListItem", "position": 3, "name": "Emma Sadleir", "item": "https://sms4smile.com/quotes/author/emma-sadleir/" }, { "@type": "ListItem", "position": 4, "name": "“The Danish physicist and Nobel Prize...", "item": "https://sms4smile.com/quotes/emma-sadleir/the-danish-physicist-and-nobel-prize-winner-niels-bohr-defined-an/" } ], "@id": "https://sms4smile.com/quotes/emma-sadleir/the-danish-physicist-and-nobel-prize-winner-niels-bohr-defined-an/#breadcrumb" }, { "@type": "WebSite", "@id": "https://sms4smile.com/quotes/#website", "name": "SMS4Smile Quotes", "url": "https://sms4smile.com/quotes/", "publisher": { "@id": "https://sms4smile.com/quotes/#organization" } }, { "@type": "Organization", "@id": "https://sms4smile.com/quotes/#organization", "name": "SMS4Smile Quotes", "url": "https://sms4smile.com/quotes/", "logo": { "@type": "ImageObject", "url": "https://sms4smile.com/quotes/wp-content/themes/sq/assets/icons/icon-512.png", "width": 512, "height": 512 } } ] } ```