Writing in the Wall Street Journal, Mark Edmundson, an author and professor of English at the University of Virginia, argues that Ralph Waldo Emerson, a giant of poetic letters, is an excellent example of resilience. Emerson, like so many of that era, knew loss up close and personally. His wife died at 19, and his eldest son died at age 5. “Life only avails not the having lived,” wrote Emerson in his essay, “Self-Reliance.” “Power ceases in the instant of repose, it resides in the moment of transition from a past to a new state, in the shooting of the gulf, in the darting to an aim.” Edmundson...