--- title: "Meaning & Key Takeaway of: If you think you understand quantum…" description: "\"If you think you understand quantum mechanics, you don't understand quantum mechanics.\" — Richard P. Feynman" image: "https://sms4smile.com/quotes/i/674/richard-p-feynman-495_ifs_if-you-think-you-understand-quantum-mech_2695065.png" --- # If you think you understand quantum mechanics, you don't… ![“If you think you understand quantum mechanics, you don't understand quantum mechanics.” quote by Richard P. Feynman](https://sms4smile.com/quotes/i/674/richard-p-feynman-495_ifs_if-you-think-you-understand-quantum-mech_2695065.png) [Download](https://sms4smile.com/quotes/i/674/richard-p-feynman-495_ifs_if-you-think-you-understand-quantum-mech_2695065.png) [Open image](https://sms4smile.com/quotes/i/674/richard-p-feynman-495_ifs_if-you-think-you-understand-quantum-mech_2695065.png) > “If you think you understand quantum mechanics, you don't understand quantum mechanics.” [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. Understanding quantum mechanics is so deep that any confidence reveals hidden gaps. **In simple terms:** True mastery shows how much you don’t know. Key Takeaway Embrace humility in learning. Themes science humility complexity Mood curious thoughtful Type scientific philosophical When to use this quote - research labs - education - philosophical debates Key Concepts quantum theory epistemology Questions to Reflect On - What do you assume you know? - How can you test your understanding? A Different Perspective Complex concepts can be oversimplified, leading to misconceptions. ★ ★ ★ ★ ★ No ratings yet [Mechanic](https://sms4smile.com/quotes/about/mechanic/) [Physics](https://sms4smile.com/quotes/about/physics/) [Programming](https://sms4smile.com/quotes/about/programming/) [Quantum](https://sms4smile.com/quotes/about/quantum/) [Quantum mechanics](https://sms4smile.com/quotes/about/quantum-mechanics/) [Thinking](https://sms4smile.com/quotes/about/thinking/) ## Related quotes > [“If you think you understand quantum theory . . . you don’t understand quantum theory.’\*”](https://sms4smile.com/quotes/richard-dawkins/if-you-think-you-understand-quantum-theory-you-don-t-understand/) [Richard Dawkins](https://sms4smile.com/quotes/author/richard-dawkins/) > [ Anybody who is not shocked by this subject has failed to understand it. \[of quantum mechanics\] ](https://sms4smile.com/quotes/niels-bohr/anybody-who-is-not-shocked-by-this-subject-has-failed-to-understand/) [Niels Bohr](https://sms4smile.com/quotes/author/niels-bohr/) > [There are many things that we still don't understand about the universe, right? Einstein struggled to bring quantum mechanics and gravity together and never…](https://sms4smile.com/quotes/edward-boyden/there-are-many-things-that-we-still-don-t-understand-about-the/) [Edward Boyden](https://sms4smile.com/quotes/author/edward-boyden/) > [I think I can safely say that nobody understands Quantum Mechanics.](https://sms4smile.com/quotes/richard-p-feynman/i-think-i-can-safely-say-that-nobody-understands-quantum-mechanics/) [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) > [It's actually kind of weird that we can comprehend the law of gravity, or that we can understand quantum mechanics, enough at least to…](https://sms4smile.com/quotes/edward-boyden/it-s-actually-kind-of-weird-that-we-can-comprehend-the-law-of-gravity/) [Edward Boyden](https://sms4smile.com/quotes/author/edward-boyden/) > [The birth of science as we know it arguably began with Isaac Newton's formulation of the laws of gravitation and motion. It is no…](https://sms4smile.com/quotes/paul-davies/the-birth-of-science-as-we-know-it-arguably-began-with-isaac-newton-s/) [Paul Davies](https://sms4smile.com/quotes/author/paul-davies/) > [Physics is really figuring out how to discover new things that are counterintuitive, like quantum mechanics. It's really counterintuitive.](https://sms4smile.com/quotes/elon-musk/physics-is-really-figuring-out-how-to-discover-new-things-that-are/) [Elon Musk](https://sms4smile.com/quotes/author/elon-musk/) > [If all this damned quantum jumping were really here to stay, I should be sorry, I should be sorry I ever got involved with…](https://sms4smile.com/quotes/erwin-schrodinger/if-all-this-damned-quantum-jumping-were-really-here-to-stay-i-should/) [Erwin Schrodinger](https://sms4smile.com/quotes/author/erwin-schrodinger/) > [What're quantum mechanics?" "I don't know. People who repair quantums, I suppose.](https://sms4smile.com/quotes/terry-pratchett/what-re-quantum-mechanics-i-don-t-know-people-who-repair-quantums-i/) [Terry Pratchett](https://sms4smile.com/quotes/author/terry-pratchett/) > [ It was about three o'clock at night when the final result of the calculation \[which gave birth to quantum mechanics\] lay before me ...… ](https://sms4smile.com/quotes/werner-heisenberg/it-was-about-three-o-clock-at-night-when-the-final-result-of-the/) [Werner Heisenberg](https://sms4smile.com/quotes/author/werner-heisenberg/) > [Anyone not shocked by quantum mechanics has not yet understood it.](https://sms4smile.com/quotes/niels-bohr/anyone-not-shocked-by-quantum-mechanics-has-not-yet-understood-it/) [Niels Bohr](https://sms4smile.com/quotes/author/niels-bohr/) > [Yes, I am a quantum mechanic! Those darn quantum computers break all the time.](https://sms4smile.com/quotes/seth-lloyd/yes-i-am-a-quantum-mechanic-those-darn-quantum-computers-break-all/) [Seth Lloyd](https://sms4smile.com/quotes/author/seth-lloyd/) > [I liked quantum mechanics very much. The subject was hard to understand but easy to apply to a large number of interesting problems.](https://sms4smile.com/quotes/willis-lamb/i-liked-quantum-mechanics-very-much-the-subject-was-hard-to/) [Willis Lamb](https://sms4smile.com/quotes/author/willis-lamb/) > [String theory is the most developed theory with the capacity to unite general relativity and quantum mechanics in a consistent manner. I do believe…](https://sms4smile.com/quotes/brian-greene/string-theory-is-the-most-developed-theory-with-the-capacity-to-unite/) [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) > [A popular feel for scientific endeavors should, if possible, be restored given the needs of the twenty-first century. This does not mean that every…](https://sms4smile.com/quotes/walter-isaacson/a-popular-feel-for-scientific-endeavors-should-if-possible-be/) [Walter Isaacson](https://sms4smile.com/quotes/author/walter-isaacson/) ## More by Richard P. Feynman > [“Philosophers have said before that one of the fundamental requisites of science is that whenever you set up the same conditions, the same thing…](https://sms4smile.com/quotes/richard-p-feynman/philosophers-have-said-before-that-one-of-the-fundamental-requisites/) [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) > [My rule is, when you are unhappy, think about it. But when you're happy, don't. Why spoil it? You're probably happy for some ridiculous…](https://sms4smile.com/quotes/richard-p-feynman/my-rule-is-when-you-are-unhappy-think-about-it-but-when-you-re-happy/) [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) > [Trying to understand the way nature works involves a most terrible test of human reasoning ability. It involves subtle trickery, beautiful tightropes of logic…](https://sms4smile.com/quotes/richard-p-feynman/trying-to-understand-the-way-nature-works-involves-a-most-terrible/) [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) > [Today's brains are yesterday's mashed potatoes.](https://sms4smile.com/quotes/richard-p-feynman/today-s-brains-are-yesterday-s-mashed-potatoes/) [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) > [Mathematics is a language plus reasoning; it is like a language plus logic. Mathematics is a tool for reasoning.](https://sms4smile.com/quotes/richard-p-feynman/mathematics-is-a-language-plus-reasoning-it-is-like-a-language-plus/) [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) > [It is necessary for the very existence of science that minds exist which do not allow that nature must satisfy some preconceived conditions.](https://sms4smile.com/quotes/richard-p-feynman/it-is-necessary-for-the-very-existence-of-science-that-minds-exist/) [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) > [“There was a Princess Somebody of Denmark sitting at a table with a number of people around her, and I saw an empty chair…](https://sms4smile.com/quotes/richard-p-feynman/there-was-a-princess-somebody-of-denmark-sitting-at-a-table-with-a/) [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) > [All the time you're saying to yourself, 'I could do that, but I won't,'--which is just another way of saying that you can't.](https://sms4smile.com/quotes/richard-p-feynman/all-the-time-you-re-saying-to-yourself-i-could-do-that-but-i-won-t/) [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) > [“There's a big difference between knowing the name of something and knowing something.”](https://sms4smile.com/quotes/richard-p-feynman/there-s-a-big-difference-between-knowing-the-name-of-something-and/) [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) > [The fact that you are not sure means that it is possible that there is another way someday.](https://sms4smile.com/quotes/richard-p-feynman/the-fact-that-you-are-not-sure-means-that-it-is-possible-that-there/) [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) > [You can always recognize truth by its beauty and simplicity.](https://sms4smile.com/quotes/richard-p-feynman/you-can-always-recognize-truth-by-its-beauty-and-simplicity/) [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) > [One cannot understand... the universality of laws of nature, the relationship of things, without an understanding of mathematics. There is no other way to…](https://sms4smile.com/quotes/richard-p-feynman/one-cannot-understand-the-universality-of-laws-of-nature-the/) [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) > [Mathematics is not just a language. Mathematics is a language plus reasoning.](https://sms4smile.com/quotes/richard-p-feynman/mathematics-is-not-just-a-language-mathematics-is-a-language-plus/) [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) > [A poet once said, "The whole universe is in a glass of wine." We will probably never know in what sense he meant that,…](https://sms4smile.com/quotes/richard-p-feynman/a-poet-once-said-the-whole-universe-is-in-a-glass-of-wine-we-will/) [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) > [I was a very shy character, always feeling uncomfortable because everybody was stronger than I, and always afraid I would look like a sissy.…](https://sms4smile.com/quotes/richard-p-feynman/i-was-a-very-shy-character-always-feeling-uncomfortable-because/) [Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/) [Explore all 515 Richard P. Feynman quotes ](https://sms4smile.com/quotes/author/richard-p-feynman/) ## More Ifs quotes > [Women still, when they have breast cancer, go to work; they still lead their lives. They have to. I just did what I was…](https://sms4smile.com/quotes/monica-potter/women-still-when-they-have-breast-cancer-go-to-work-they-still-lead/) [Monica Potter](https://sms4smile.com/quotes/author/monica-potter/) > [Most of us are convinced that we are our egos, which is who we think we are. The ego is part of our incarnation.…](https://sms4smile.com/quotes/ram-dass/most-of-us-are-convinced-that-we-are-our-egos-which-is-who-we-think/) [Ram Dass](https://sms4smile.com/quotes/author/ram-dass/) > [Histories never conclude; they just pause their prose. Their stories are, if they are truthful, untidy affairs, resistant to windings-up and sortings-out. They beat…](https://sms4smile.com/quotes/simon-schama/histories-never-conclude-they-just-pause-their-prose-their-stories/) [Simon Schama](https://sms4smile.com/quotes/author/simon-schama/) > [If you ask an introvert a question, wait until she thinks about it. Introverts think before speaking, not through speaking. If you want to…](https://sms4smile.com/quotes/laurie-helgoe/if-you-ask-an-introvert-a-question-wait-until-she-thinks-about-it/) [Laurie Helgoe](https://sms4smile.com/quotes/author/laurie-helgoe/) > [Many individuals spend a considerable portion of their lifetimes in terror of one imagined catastrophe or another. The classic is that your immortal soul…](https://sms4smile.com/quotes/l-neil-smith/many-individuals-spend-a-considerable-portion-of-their-lifetimes-in/) [L. Neil Smith](https://sms4smile.com/quotes/author/l-neil-smith/) > [Obviously, if you don't love life, you can't enjoy an oyster.](https://sms4smile.com/quotes/eleanor-clark/obviously-if-you-don-t-love-life-you-can-t-enjoy-an-oyster/) [Eleanor Clark](https://sms4smile.com/quotes/author/eleanor-clark/) > [If I don't have pressure, I don't function.](https://sms4smile.com/quotes/ferran-adria/if-i-don-t-have-pressure-i-don-t-function/) [Ferran Adria](https://sms4smile.com/quotes/author/ferran-adria/) > [If you restore a car, and you're making money, then you're doing it wrong.](https://sms4smile.com/quotes/jay-leno/if-you-restore-a-car-and-you-re-making-money-then-you-re-doing-it/) [Jay Leno](https://sms4smile.com/quotes/author/jay-leno/) > [I understand that it's the music that keeps me alive... That's my lifeblood. And to give that up for, like, the TV, the cars,…](https://sms4smile.com/quotes/bruce-springsteen/i-understand-that-it-s-the-music-that-keeps-me-alive-that-s-my/) [Bruce Springsteen](https://sms4smile.com/quotes/author/bruce-springsteen/) > [If we gave up our freedom as the price of security, we would no longer be the great nation that we are.](https://sms4smile.com/quotes/ruth-bader-ginsburg/if-we-gave-up-our-freedom-as-the-price-of-security-we-would-no-longer/) [Ruth Bader Ginsburg](https://sms4smile.com/quotes/author/ruth-bader-ginsburg/) > [If my campaign is not in the debate, we will not be talking about how we really fix this problem of endless and expanding…](https://sms4smile.com/quotes/jill-stein/if-my-campaign-is-not-in-the-debate-we-will-not-be-talking-about-how/) [Jill Stein](https://sms4smile.com/quotes/author/jill-stein/) > [Nothing is so powerful as an insight into human nature... what compulsions drive a man, what instincts dominate his action. If you know these…](https://sms4smile.com/quotes/william-bernbach/nothing-is-so-powerful-as-an-insight-into-human-nature-what/) [William Bernbach](https://sms4smile.com/quotes/author/william-bernbach/) > [But we are convinced that if we are to play a meaningful role nationally, and in the community of nations, we must be second…](https://sms4smile.com/quotes/vikram-sarabhai/but-we-are-convinced-that-if-we-are-to-play-a-meaningful-role/) [Vikram Sarabhai](https://sms4smile.com/quotes/author/vikram-sarabhai/) > [The thing about hitting kids is, think about if you were doing the same thing to another adult. Hitting your kid is really the…](https://sms4smile.com/quotes/zach-braff/the-thing-about-hitting-kids-is-think-about-if-you-were-doing-the/) [Zach Braff](https://sms4smile.com/quotes/author/zach-braff/) > [Reader, if you are gifted with nerves like mine, aspire to any character but that of a wit.](https://sms4smile.com/quotes/charles-lamb/reader-if-you-are-gifted-with-nerves-like-mine-aspire-to-any/) [Charles Lamb](https://sms4smile.com/quotes/author/charles-lamb/) Browse all 94,303 Ifs quotes ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Quotation", "text": "If you think you understand quantum mechanics, you don't understand quantum mechanics.", "creator": { "@type": "Person", "name": "Richard P. 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