I attended a Christian university in the long ago days of acid wash denim and Commodore 64s. One of my classmates, Ken Jacobsen, had a gift for impersonation. He was renowned for his imitation of Bono on the U2 song "I Still Haven't Found What I'm Looking For." "I have spoke with the tongue of angels," he'd croon when he got to the fourth verse. "I have held the hand of a devil." But then he'd alter the lyric and sing, "N-o-t literally. It's only a metaphor." That always got a huge laugh.

It's been decades, but I still remember the joke. I realize now it was humorous not only for its inherent silliness, but also for the way it held up a mirror to something funny about ourselves.