We had a West Highland Terrier for a number of years. “Westies” are tough little dogs, bred to tunnel into badger holes and engage the “enemy” in its lair. Our Westie was many generations removed from her origins, but she still retained that instinct, put into her through years of breeding. On one occasion she became obsessed by some “critter” under a rock in our back yard. Nothing could dissuade her. She dug and dug until she tunneled several feet under the rock.

Now consider this question: Why do we as humans pursue, pursue, pursue? Why must we climb unclimbed mountains,…