While waiting to pick up a friend at the airport in Portland, Oregon, I had one of those life-changing experiences that you hear other people talk about — the kind that sneaks up on you unexpectedly. This one occurred a mere two feet away from me. Straining to locate my friend among the passengers deplaning through the jet way, I noticed a man coming toward me carrying two light bags. He stopped right next to me to greet his family. First, he hugged his three children, one-by-one. After several moments, he handed his baby daughter...