“Perfectionism is one of the scariest words I know,” Kathleen Norris writes, thoughtfully contrasting modern-day perfectionism with the “perfection” described in Matthew. Modern-day perfectionism she describes as a “a serious psychological affliction that makes people too timid to take necessary risks.” But the word translated “perfect” in Matthew actually means mature, complete, or whole. Norris concludes, “To be perfect . . . is to make room for growth [and become] mature enough to give ourselves to others.”

Understanding perfection this way helps makes sense of the profound story told in Matthew 19, where a man asks Jesus what good he can do that…