Spacetime Quotes (4 quotes)
Adapting from the earlier book Gravitation, I wrote, Spacetime tells matter how to move; matter tells spacetime how to curve. In other words, a bit of matter (or mass, or energy) moves in accordance with the dictates of the curved spacetime where it is located. At the same time, that bit of mass or energy is itself contributing to the curvature of spacetime everywhere.
I do not believe that a real understanding of the nature of elementary particles can ever be achieved without a simultaneous deeper understanding of the nature of spacetime itself.
Spacetime tells matter how to move; matter tells spacetime how to curve.
Wheelers First Moral Principle: Never make a calculation until you know the answer. Make an estimate before every calculation, try a simple physical argument (symmetry! invariance! conservation!) before every derivation, guess the answer to every paradox and puzzle. Courage: No one else needs to know what the guess is. Therefore make it quickly, by instinct. A right guess reinforces this instinct. A wrong guess brings the refreshment of surprise. In either case life as a spacetime expert, however long, is more fun!