--- title: "Meaning & Key Takeaway of: Many of the important principles in…" description: "\"“Many of the important principles in twentieth century physics are expressed as limitations on what we can know. Einstein's principle of relativity (wh..." image: "https://sms4smile.com/quotes/i/f6a/lee-smolin-4171_black-hole_many-of-the-important-principles-in-twen_541348.jpg" --- # Many of the important principles in twentieth century… ![“Many of the important principles in twentieth century physics are expressed as limitations on what we can know. Einstein's principle of relativity (which was an extension of a principle of Galileo's) says that we cannot do any experiment that would distinguish being at rest from moving at a…” quote by Lee Smolin](https://sms4smile.com/quotes/i/f6a/lee-smolin-4171_black-hole_many-of-the-important-principles-in-twen_541348.jpg) [Download](https://sms4smile.com/quotes/i/f6a/lee-smolin-4171_black-hole_many-of-the-important-principles-in-twen_541348.jpg) [Open image](https://sms4smile.com/quotes/i/f6a/lee-smolin-4171_black-hole_many-of-the-important-principles-in-twen_541348.jpg) > ““Many of the important principles in twentieth century physics are expressed as limitations on what we can know. Einstein's principle of relativity (which was an extension of a principle of Galileo's) says that we cannot do any experiment that would distinguish being at rest from moving at a constant velocity. Heisenberg's uncertainty principle tells us that we cannot know both the position and momentum of a particle to arbitrary accuracy. This new limitation tells us there is an absolute bound to the information available to us about what is contained on the other side of a horizon. It is known as Bekenstein's bound, as it was discussed in papers Jacob Bekenstein wrote in the 1970s shortly after he discovered the entropy of black holes.”” [Lee Smolin](https://sms4smile.com/quotes/author/lee-smolin/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. Fundamental physics imposes limits on what can be known, setting absolute bounds on information. **In simple terms:** Physics tells us there are inherent limits to knowledge. Key Takeaway Accept uncertainty and work within known constraints. Themes physics knowledge uncertainty limits information theory Mood curious reflective Type academic philosophical When to use this quote - Designing experiments - interpreting quantum data - exploring black hole thermodynamics Key Concepts Relativity Heisenberg principle Bekenstein bound information theory Questions to Reflect On - What are the practical implications of these limits? - How can we push beyond current knowledge boundaries? A Different Perspective These limits can hinder technological progress and understanding. ★ ★ ★ ★ ★ No ratings yet [Black hole](https://sms4smile.com/quotes/about/black-hole/) [Black holes](https://sms4smile.com/quotes/about/black-holes/) [Uncertainty principle](https://sms4smile.com/quotes/about/uncertainty-principle/) ## Related quotes > [“We thus arrive at the important result: Events that are simultaneous with reference to the embankment are not simultaneous with respect to the train,”…](https://sms4smile.com/quotes/walter-isaacson/we-thus-arrive-at-the-important-result-events-that-are-simultaneous/) [Walter Isaacson](https://sms4smile.com/quotes/author/walter-isaacson/) > [Quantum mechanics brought an unexpected fuzziness into physics because of quantum uncertainty, the Heisenberg uncertainty principle.](https://sms4smile.com/quotes/edward-witten/quantum-mechanics-brought-an-unexpected-fuzziness-into-physics-2/) [Edward Witten](https://sms4smile.com/quotes/author/edward-witten/) > [Old Newtonian physics claimed that things have an objective reality separate from our perception of them. 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Nobody's perfect. I accept my limitations." 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Position is very much a…](https://sms4smile.com/quotes/john-gribbin/heisenberg-s-uncertainty-relation-measures-the-amount-by-which-the/) [John Gribbin](https://sms4smile.com/quotes/author/john-gribbin/) ## More by Lee Smolin > [“This unification of forces and motion has a simple consequence. In a particle theory, you can freely add all kinds of forces, so there…](https://sms4smile.com/quotes/lee-smolin/this-unification-of-forces-and-motion-has-a-simple-consequence-in-a/) [Lee Smolin](https://sms4smile.com/quotes/author/lee-smolin/) > [“One field Faraday studied was the electric field. This is not a number but a vector, which we may visualize as an arrow and…](https://sms4smile.com/quotes/lee-smolin/one-field-faraday-studied-was-the-electric-field-this-is-not-a-number/) [Lee Smolin](https://sms4smile.com/quotes/author/lee-smolin/) > [“It is interesting to note that the quantum-mechanical revolution was made by a virtually orphaned generation of scientists. 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However, in spite of great progress…](https://sms4smile.com/quotes/lee-smolin/these-two-discoveries-of-relativity-and-of-the-quantum-each-required/) [Lee Smolin](https://sms4smile.com/quotes/author/lee-smolin/) > [“So the challenge for any quantum theory of gravity is to give us a deeper understanding of Bekenstein's entropy and Hawking's temperature.”](https://sms4smile.com/quotes/lee-smolin/so-the-challenge-for-any-quantum-theory-of-gravity-is-to-give-us-a/) [Lee Smolin](https://sms4smile.com/quotes/author/lee-smolin/) > [“Problem 1: Combine general relativity and quantum theory into a single theory that can claim to be the complete theory of nature. This is…](https://sms4smile.com/quotes/lee-smolin/problem-1-combine-general-relativity-and-quantum-theory-into-a-single/) [Lee Smolin](https://sms4smile.com/quotes/author/lee-smolin/) > [“The loop approach to quantum gravity is now a thriving field of research. 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The first waves…](https://sms4smile.com/quotes/rainer-weiss/the-waves-travel-with-the-velocity-of-light-and-slightly-squeeze-and/) [Rainer Weiss](https://sms4smile.com/quotes/author/rainer-weiss/) > [“The bank man had been standing quietly by our picnic table, waiting to lock up the house. Around his waist he wore a live…](https://sms4smile.com/quotes/c-e-medford/the-bank-man-had-been-standing-quietly-by-our-picnic-table-waiting-to/) C.E. Medford > [If space is a fabric, then of course fabrics can have ripples, which we have now seen directly. But fabrics can also rip. Then…](https://sms4smile.com/quotes/michio-kaku/if-space-is-a-fabric-then-of-course-fabrics-can-have-ripples-which-we/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [It's hard for me to speculate about what motivates somebody like Stephen Hawking or Elon Musk to talk so extensively about AI. 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