"A Universe in Your Backyard," in Third Culture: Beyond the Scientific Revolution (1996) ed. John Brockman, p. 279.
“The universe would have expanded in a smooth way from a single point. As it expanded, it would have borrowed energy from the gravitational field, to create matter. As any economist could have predicted, the result of all that borrowing, was inflation. The universe expanded and borrowed at an ever-increasing rate. Fortunately, the debt of gravitational energy will not have to be repaid until the end of the universe.”
The Beginning of Time (1996)
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Stephen Hawking 122
British theoretical physicist, cosmologist, and author 1942–2018Related quotes
[The Eternally Existing, Self-reproducing, Frequently Puzzling Inflationary Universe, Preposterous Universe blog, 21 October 2011, http://www.preposterousuniverse.com/blog/2011/10/21/the-eternally-existing-self-reproducing-frequently-puzzling-inflationary-universe/]
“Torah is an ever-expanding universe”
                                        
                                        Preface, p. ix 
500 Questions and Answers on Chanukah (Vallentine Mitchell, 2005, ISBN 0-85303-676-4
                                    
“You are the ever-expanding universe to me”
Source: Flora and Ulysses: The Illuminated Adventures
“The sensation of energy expands with increasing relaxation.”
Source: Dean of the Plasma Dissidents (1988), p. 196.
                                        
                                        Space, Time and Gravitation (1920) 
Context: We can see that, the constant in the law of gravitation being fixed, there may be some upper limit to the amount of matter possible; as more and more matter is added in the distant parts, space curves round and ultimately closes; the process of adding more matter must stop, because there is no more space, and we can only return to the region already dealt with. But there seems nothing to prevent a defect of matter, leaving space unclosed. Some mechanism seems to be needed, whereby either gravitation creates matter, or all the matter in the universe conspires to define a law of gravitation.<!--p.163