--- title: "Meaning & Key Takeaway of: Uncertainty\" is NOT \"I don't know.\" It is…" description: "\"Uncertainty\" is NOT \"I don't know.\" It is \"I can't know.\" \"I am uncertain\" does not mean \"I could be certain.\" — Werner Heisenberg" image: "https://sms4smile.com/quotes/i/eff/werner-heisenberg-4501_arrogance_uncertainty-is-not-i-don-t-know-it-is-i_1301337.jpg" --- # Uncertainty" is NOT "I don't know." It is "I can't know."… ![“Uncertainty" is NOT "I don't know." It is "I can't know." "I am uncertain" does not mean "I could be certain.” quote by Werner Heisenberg](https://sms4smile.com/quotes/i/eff/werner-heisenberg-4501_arrogance_uncertainty-is-not-i-don-t-know-it-is-i_1301337.jpg) [Download](https://sms4smile.com/quotes/i/eff/werner-heisenberg-4501_arrogance_uncertainty-is-not-i-don-t-know-it-is-i_1301337.jpg) [Open image](https://sms4smile.com/quotes/i/eff/werner-heisenberg-4501_arrogance_uncertainty-is-not-i-don-t-know-it-is-i_1301337.jpg) > “Uncertainty" is NOT "I don't know." It is "I can't know." "I am uncertain" does not mean "I could be certain.” [Werner Heisenberg](https://sms4smile.com/quotes/author/werner-heisenberg/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. Uncertainty denotes inherent limits of knowledge, not mere lack of information. **In simple terms:** Limits of knowledge are built‑in, not just ignorance. Key Takeaway Accept that some things are unknowable. Themes science philosophy humility Mood thoughtful curious Type philosophical inspirational When to use this quote - research - decision making - risk assessment - personal growth Key Concepts Quantum mechanics epistemology Questions to Reflect On - How do you handle decisions with unknown outcomes? - What can you control when faced with uncertainty? 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The funny thing is that, honestly, I don't think I'm believable as these aristocratic mean girls.…](https://sms4smile.com/quotes/katie-mcgrath/i-do-keep-getting-these-bad-girl-roles-the-funny-thing-is-that/) [Katie McGrath](https://sms4smile.com/quotes/author/katie-mcgrath/) > [“Mean girls die young, sweetie. Take my word for it.”](https://sms4smile.com/quotes/lena-brown/mean-girls-die-young-sweetie-take-my-word-for-it/) Lena Brown > [My friend and I do this all the time to my other friend, but with us, it's either The Hunger Games, or Mean Girls.](https://sms4smile.com/quotes/anonymous/my-friend-and-i-do-this-all-the-time-to-my-other-friend-but-with-us/) [Anonymous](https://sms4smile.com/quotes/author/anonymous/) > [If you're from Africa, why are you white?](https://sms4smile.com/quotes/anonymous/if-you-re-from-africa-why-are-you-white/) [Anonymous](https://sms4smile.com/quotes/author/anonymous/) > ['Mean Girls' is literally one of my favorite movies. It's just such a classic. 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I became the victim of myself.](https://sms4smile.com/quotes/tyra-banks/i-became-a-victim-of-mean-girls-i-became-the-victim-of-myself/) [Tyra Banks](https://sms4smile.com/quotes/author/tyra-banks/) > [Given that there was that era of girl group music and it's still very popular, but I think if you looked at the chart…](https://sms4smile.com/quotes/lesley-gore/given-that-there-was-that-era-of-girl-group-music-and-it-s-still-very/) [Lesley Gore](https://sms4smile.com/quotes/author/lesley-gore/) ## More by Werner Heisenberg > [“Revere those things beyond science which really matter and about which it is so difficult to speak.”](https://sms4smile.com/quotes/werner-heisenberg/revere-those-things-beyond-science-which-really-matter-and-about/) [Werner Heisenberg](https://sms4smile.com/quotes/author/werner-heisenberg/) > [“In the history of science, ever since the famous trial of Galileo, it has repeatedly been claimed that scientific truth cannot be reconciled with…](https://sms4smile.com/quotes/werner-heisenberg/in-the-history-of-science-ever-since-the-famous-trial-of-galileo-it/) [Werner Heisenberg](https://sms4smile.com/quotes/author/werner-heisenberg/) > [The more closely you look at one thing, the less closely can you see something else.](https://sms4smile.com/quotes/werner-heisenberg/the-more-closely-you-look-at-one-thing-the-less-closely-can-you-see/) [Werner Heisenberg](https://sms4smile.com/quotes/author/werner-heisenberg/) > [I think that if a United States of Europe were to be formed, it would be in our interests to fight for it, as…](https://sms4smile.com/quotes/werner-heisenberg/i-think-that-if-a-united-states-of-europe-were-to-be-formed-it-would/) [Werner Heisenberg](https://sms4smile.com/quotes/author/werner-heisenberg/) > [Whether we electrons, light quanta, benzol molecules, or stones, we shall always come up against these two characteristics, the corpuscular and the undular.](https://sms4smile.com/quotes/werner-heisenberg/whether-we-electrons-light-quanta-benzol-molecules-or-stones-we-shall/) [Werner Heisenberg](https://sms4smile.com/quotes/author/werner-heisenberg/) > [It is probably true quite generally that in the history of human thinking the most fruitful developments frequently take place at those points where…](https://sms4smile.com/quotes/werner-heisenberg/it-is-probably-true-quite-generally-that-in-the-history-of-human/) [Werner Heisenberg](https://sms4smile.com/quotes/author/werner-heisenberg/) > [If we made atomic bombs, we would bring about a terrible change in the world. 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In fact the smallest units of matter are not physical objects in…](https://sms4smile.com/quotes/werner-heisenberg/i-think-that-modern-physics-has-definitely-decided-in-favor-of-plato/) [Werner Heisenberg](https://sms4smile.com/quotes/author/werner-heisenberg/) > [The end of the First World War had thrown Germany's youth into great turmoil. The reins of power had fallen from the hands of…](https://sms4smile.com/quotes/werner-heisenberg/the-end-of-the-first-world-war-had-thrown-germany-s-youth-into-great/) [Werner Heisenberg](https://sms4smile.com/quotes/author/werner-heisenberg/) [Explore all 109 Werner Heisenberg quotes ](https://sms4smile.com/quotes/author/werner-heisenberg/) ## More Arrogance quotes > [Perhaps no order of mammals presents us with so extraordinary a series of gradations as this \[step by step, from humans to apes to…](https://sms4smile.com/quotes/thomas-huxley/perhaps-no-order-of-mammals-presents-us-with-so-extraordinary-a/) [Thomas Huxley](https://sms4smile.com/quotes/author/thomas-huxley/) > [wishes for sons by Lucille Clifton i wish them cramps. i wish them a strange town and the last tampon. I wish them no…](https://sms4smile.com/quotes/lucille-clifton/wishes-for-sons-by-lucille-clifton-i-wish-them-cramps-i-wish-them-a/) [Lucille Clifton](https://sms4smile.com/quotes/author/lucille-clifton/) > [The structure of the Swiss ruling class is rock-hard, and unchanged since the time of Napoleon. They sit on their mountains and lecture the…](https://sms4smile.com/quotes/jean-ziegler/the-structure-of-the-swiss-ruling-class-is-rock-hard-and-unchanged/) [Jean Ziegler](https://sms4smile.com/quotes/author/jean-ziegler/) > [What you see of me on TV and all of that, that is me - that's truly how I feel. I'm just multiplying it.…](https://sms4smile.com/quotes/baron-corbin/what-you-see-of-me-on-tv-and-all-of-that-that-is-me-that-s-truly-how/) [Baron Corbin](https://sms4smile.com/quotes/author/baron-corbin/) > [I don't join the New Atheists. 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All of these are elements of the sin, but the heart,…](https://sms4smile.com/quotes/ezra-taft-benson/most-of-us-think-of-pride-as-self-centeredness-conceit-boastfulness/) [Ezra Taft Benson](https://sms4smile.com/quotes/author/ezra-taft-benson/) > [“I was consumed by a selfishness and arrogance that I didn't dare let go of until I found a new persona to hide behind.”](https://sms4smile.com/quotes/dorothy-koomson/i-was-consumed-by-a-selfishness-and-arrogance-that-i-didn-t-dare-let/) [Dorothy Koomson](https://sms4smile.com/quotes/author/dorothy-koomson/) > [Arrogance is the outgrowth of prosperity.](https://sms4smile.com/quotes/plautus/arrogance-is-the-outgrowth-of-prosperity/) [Plautus](https://sms4smile.com/quotes/author/plautus/) > [Timing and arrogance are decisive factors in the successful use of talent.](https://sms4smile.com/quotes/marya-mannes/timing-and-arrogance-are-decisive-factors-in-the-successful-use-of/) [Marya Mannes](https://sms4smile.com/quotes/author/marya-mannes/) > [Some say work smarter, not harder, but the wisest are both. Whether you're more of a hard worker or a smart worker, if you're…](https://sms4smile.com/quotes/colby-tatem/some-say-work-smarter-not-harder-but-the-wisest-are-both-whether-you/) [Colby Tatem](https://sms4smile.com/quotes/author/colby-tatem/) > [Closed some doors, not because of pride, incapacity or arrogance, but simply because they no longer lead somewhere.](https://sms4smile.com/quotes/frenz-jeffrey/closed-some-doors-not-because-of-pride-incapacity-or-arrogance-but/) [Frenz Jeffrey](https://sms4smile.com/quotes/author/frenz-jeffrey/) > [My success isn't a result of arrogance - it's a result of belief.](https://sms4smile.com/quotes/conor-mcgregor/my-success-isn-t-a-result-of-arrogance-it-s-a-result-of-belief/) [Conor McGregor](https://sms4smile.com/quotes/author/conor-mcgregor/) > [“...a great man who is vicious will only be a great doer of evil, and a rich man who is not liberal will be…](https://sms4smile.com/quotes/miguel-cervantes/a-great-man-who-is-vicious-will-only-be-a-great-doer-of-evil-and-a/) Miguel Cervantes > [An increasing number of people are growing uncomfortable with the gulf between the world's rich and the poor. 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