“The laws of physics suggest we cannot go in one direction forever. Sooner or later, something will slow us down. Whether it be stocks, housing prices, economies, or entire civilizations, even the biggest boom stall. We build castles, churches, and monuments believing they will last forever; our perception of solidity often belies an underlying movement that is difficult to perceive. Sometimes we can see the wave of change coming. But more often we are swept along in it.”
