Decades ago, when my son Dave was only about five years old, he sat in the back seat of the car, staring at the full moon as I drove through the night. He was quiet, lost in thought.
“Dad,” he finally said, “why does the moon follow us?”
“Follow us?” I said. “What do you mean?”
“Everywhere we go,” he said, “the moon has been following us. It doesn’t matter how fast we go, we can’t get ahead of it. It’s always there.