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

— John Archibald Wheeler, Geons, Black Holes, and Quantum Foam: A Life in Physics (2000)

Source: http://books.google.com/books?id=zGFkK2tTXPsC&lpg=PA1&pg=PA235

Wheeler's summary of Einstein's general relativity.

Topics: physics