Imagine a runner at the starting line, with the whole track ahead of her. The track is not like any she’s ever seen. It goes on forever, never-ending. The race begins, and the runner is off. Astonishingly, with every step, her speed increases exponentially. A few miles go by in the blink of an eye, and she isn’t even breathing hard. There is no pain in her muscles, no weariness, no thirst, or need for rest. As the miles pass by, the joy of the race grows and grows. Just as she thinks the track is about to end, another thousand miles open before her. And another. And another.