“Spacetime tells matter how to move; matter tells spacetime how to curve.”

—  John Archibald Wheeler

Wheeler's succinct summary of Einstein's theory of general relativity, in Geons, Black Holes, and Quantum Foam (2000), p. 235. http://books.google.com/books?id=zGFkK2tTXPsC&lpg=PA1&pg=PA235

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John Archibald Wheeler 16
American physicist 1911–2008

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