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Stephen Hawking

Stephen Hawking Quotes

Physicist

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Famous Stephen Hawking Quotes

“I think my dad [ Stephen Hawking] would have been pleased if I had turned out a scientist because he truly believes that is the most interesting career open to anyone. But he also believes that you have to follow your own path in life and so he certainly wasn't going to push me toward theoretical physics when it didn't look like I was going in that direction naturally.”

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Author:Stephen Hawking
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“If it [the universe] was expanding fairly slowly, the force of gravity would cause it eventually to stop expanding and then to start contracting. However, if it was expanding at more than a certain critical rate, gravity would never be strong enough to stop it, and the universe would continue to expand forever.”

IfsEnoughCertainUniverseStrongForceCausesForeverRateCriticalGravityExpandingStrong EnoughContracting
Book:The Illustrated Theory of Everything: The Origin and Fate of the Universe
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“If we do discover a complete theory, it should be in time understandable in broad principle by everyone. Then we shall all, philosophers, scientists, and just ordinary people be able to take part in the discussion of why we and the universe exist.”

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Book:A Brief History of Time: From the Big Bang to Black Holes
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“If at first you don't succeed, try management.”

IfsTryingFirstsSuccessSuccessfulSucceedManagementPerseveranceObstaclesQuittingPersistenceRejectionKeep GoingSuccessful PeoplePersistNo PointKeep TryingTry AgainHeedGreat SuccessSuccessful BusinessSuccess FailureAstonishmentMotivational SuccessSuccesInspirational SuccessBest SuccessKeep RunningGiving Up Is Not An OptionTruismFunny BusinessDetermination PerseveranceAbout SuccessGreatest SuccessLearning From FailureWill To SucceedGreat PerseveranceBusiness ManagementGreatest ObstaclesLife SucksReaching SuccessKaizenTrying To SucceedSucceeding In BusinessDreaming And SuccessHowl's Moving CastleWise ProverbsPlanning For SuccessPlaying The FoolSpanish And EnglishInspirational OfficeNo Point In TryingVision And SuccessCelebrate SuccessExam Success
Author:Stephen Hawking
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“Gravity is so strong that space is bent round onto itself, making it rather like the surface of the earth. If one keeps traveling in a certain direction on the surface of the earth, one never comes up against an impassable barrier or falls over the edge, but eventually comes back to where one started.”

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Book:A Brief History Of Time: From Big Bang To Black Holes
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“If the rate of expansion one second after the Big Bang had been smaller by even one part in a hundred thousand million million, it would have recollapsed before it reached its present size. On the other hand, if it had been greater by a part in a million, the universe would have expanded too rapidly for stars and planets to form.”

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Author:Stephen Hawking
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“The intelligent beings in these regions should therefore not be surprised if they observe that their locality in the universe satisfies the conditions that are necessary for their existence. It is a bit like a rich person living in a wealthy neighborhood not seeing any poverty.”

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Book:A Brief History Of Time: From Big Bang To Black Holes
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“The universe and the Laws of Physics seem to have been specifically designed for us. If any one of about 40 physical qualities had more than slightly different values, life as we know it could not exist: Either atoms would not be stable, or they wouldn't combine into molecules, or the stars wouldn't form heavier elements, or the universe would collapse before life could develop, and so on...”

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Author:Stephen Hawking
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“If it were only a few degrees, that would be serious, but we could adapt to it. But the danger is the warming process might be unstable and run away. We could end up like Venus, covered in clouds and with the surface temperature of 400 degrees. It could be too late if we wait until the bad effects of warming become obvious. We need action now to reduce emission of carbon dioxide.”

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Author:Stephen Hawking
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“One can imagine that God created the universe at literally any time in the past. On the other hand, if the universe is expanding, there may be physical reasons why there had to be a beginning. One could imagine that God created the universe at the instant of the big bang, or even afterwards in just such a way as to make it look as though there had been a big bang, but it would be meaningless to suppose that it was created before the big bang. An expanding universe does not preclude a creator, but it does place limits on when he might have carried out his job!”

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Author:Stephen Hawking
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