“Recently a pilot was practicing high-speed maneuvers in a jet fighter. She turned the controls for what she thought was a steep ascent—and flew straight into the ground. She was unaware that she had been flying upside down. This is a parable of human existence in our times—not exactly that everyone is crashing, though there is enough of that—but most of us as individuals, and world society as a whole, live at high-speed, and often with no clue to whether we are flying upside down or right-side up. Indeed, we are haunted by a strong suspicion that there may be no difference—or at least that it is unknown or irrelevant.”