A young man sitting in church one day made a startling discovery. He was a pre‑med student, only nineteen years of age. The sermon that day was probably a dull one. There are such things I understand, dull sermons. Of course, you wouldn’t know about such things.

Anyway, instead of listening to the sermon, this young man’s attention was drawn to the altar lantern swaying back and forth, back and forth, back and forth. [“You are getting very sleepy . . .” If I could hypnotize all of you, I could stop now and go home.] This young man, however, did not get sleepy. Instead, he started timing the swings of the lantern, using his own pulse as a clock. And he made a discovery, a discovery that changed his life, and to a certain extent, changed our world. For, after this experience, this young man…