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The Illustrated Theory of Everything: The Origin and Fate of the Universe

Book by Stephen Hawking · 3 quotes · Universe, Boundaries, Ends

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The Illustrated Theory of Everything: The Origin and Fate of the Universe Quotes

“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.”

“One could say: "The boundary condition of the universe is that it has no boundary." The universe would be completely self-contained and not affected by anything outside itself. It would neither be created nor destroyed. It would just BE.”