I like to watch birds at play, so years ago I built a small sanctuary in our backyard to attract them. For several months I enjoyed the sight of my feathered friends feeding and flitting about—until a Cooper’s Hawk made my bird refuge his private hunting reserve.

Such is life: Just about the time we settle down to take our ease, something or someone comes along to unsettle our nests. Why, we ask, must so much of life be a vale of tears?

I’ve heard many answers to that old question, but lately I’m satisfied with just one: “All the discipline of…