--- title: "Meaning & Key Takeaway of: The bottom line is that time travel is…" description: "\"The bottom line is that time travel is allowed by the laws of physics.\" — Brian Greene" image: "https://sms4smile.com/quotes/i/ffc/brian-greene-2334_bottom_the-bottom-line-is-that-time-travel-is-a_2759696.png" --- # The bottom line is that time travel is allowed by the laws… ![“The bottom line is that time travel is allowed by the laws of physics.” quote by Brian Greene](https://sms4smile.com/quotes/i/ffc/brian-greene-2334_bottom_the-bottom-line-is-that-time-travel-is-a_2759696.png) [Download](https://sms4smile.com/quotes/i/ffc/brian-greene-2334_bottom_the-bottom-line-is-that-time-travel-is-a_2759696.png) [Open image](https://sms4smile.com/quotes/i/ffc/brian-greene-2334_bottom_the-bottom-line-is-that-time-travel-is-a_2759696.png) > “The bottom line is that time travel is allowed by the laws of physics.” [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. Physics permits time travel under certain theoretical conditions, though practical implementation remains speculative. **In simple terms:** Physics allows time travel theoretically. Key Takeaway Explore scientific possibilities responsibly. Themes science theory possibility Mood curious speculative Type scientific philosophical When to use this quote - research proposals - science fiction writing - educational talks Key Concepts relativity quantum mechanics Questions to Reflect On - What paradoxes arise with time travel? - How could we test such theories? 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Tipler](https://sms4smile.com/quotes/author/frank-j-tipler/) > [American laws don't work, but at least the laws of physics might work.](https://sms4smile.com/quotes/gore-vidal/american-laws-don-t-work-but-at-least-the-laws-of-physics-might-work/) [Gore Vidal](https://sms4smile.com/quotes/author/gore-vidal/) > [There are two worlds we live in: a material world, bound by the laws of physics, and the world inside our mind, which is…](https://sms4smile.com/quotes/alan-moore/there-are-two-worlds-we-live-in-a-material-world-bound-by-the-laws-of/) [Alan Moore](https://sms4smile.com/quotes/author/alan-moore/) ## More by Brian Greene > [The boldness of asking deep questions may require unforeseen flexibility if we are to accept the answers.](https://sms4smile.com/quotes/brian-greene/the-boldness-of-asking-deep-questions-may-require-unforeseen/) [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) > [The number of e-mails and letters that I get from choreographers, from sculptors, from composers who are being inspired by science is huge.](https://sms4smile.com/quotes/brian-greene/the-number-of-e-mails-and-letters-that-i-get-from-choreographers-from/) [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) > [One of the wonders of science is that it is completely universal. It crosses national boundaries with total ease.](https://sms4smile.com/quotes/brian-greene/one-of-the-wonders-of-science-is-that-it-is-completely-universal-it/) [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) > [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/) > [But, as Einstein once said, “For we convinced physicists, the distinction between past, present, and future is only an illusion, however persistent.”5](https://sms4smile.com/quotes/brian-greene/but-as-einstein-once-said-for-we-convinced-physicists-the-distinction/) [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) > [Sometimes attaining the deepest familiarity with a question is our best substitute for actually having the answer.](https://sms4smile.com/quotes/brian-greene/sometimes-attaining-the-deepest-familiarity-with-a-question-is-our/) [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) > [When kids look up to great scientists the way they do to great musicians and actors, civilization will jump to the next level](https://sms4smile.com/quotes/brian-greene/when-kids-look-up-to-great-scientists-the-way-they-do-to-great/) [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) > [I have long thought that anyone who does not regularly - or ever - gaze up and see the wonder and glory of a…](https://sms4smile.com/quotes/brian-greene/i-have-long-thought-that-anyone-who-does-not-regularly-or-ever-gaze/) [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) > [There are many of us thinking of one version of parallel universe theory or another. If it's all a lot of nonsense, then it's…](https://sms4smile.com/quotes/brian-greene/there-are-many-of-us-thinking-of-one-version-of-parallel-universe/) [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) > [As every parent knows, children begin life as uninhibited, unabashed explorers of the unknown. From the time we can walk and talk, we want…](https://sms4smile.com/quotes/brian-greene/as-every-parent-knows-children-begin-life-as-uninhibited-unabashed/) [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) > [The full name of string theory is really superstring theory. 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You want to write in a way that an actor has material to…](https://sms4smile.com/quotes/brian-greene/writing-for-the-stage-is-different-from-writing-for-a-book-you-want/) [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) > [We know that if supersymmetric particles exist, they must be very heavy; otherwise we would have spotted them by now.](https://sms4smile.com/quotes/brian-greene/we-know-that-if-supersymmetric-particles-exist-they-must-be-very/) [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) > [The beauty of string theory is the metaphor kind of really comes very close to the reality. 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