We describe a person without compassion as “heartless,” and we urge him or her to “have a heart.” Our deepest hurts we call “heartaches.” Jilted lovers are “brokenhearted.” Courageous soldiers are “bravehearted.” The truly evil are “black-hearted” and saints have “hearts of gold.” If we need to speak at the most intimate level, we ask for a “heart-to-heart” talk. “Lighthearted” is how we feel on vacation. And when we love someone as truly as we may, we love “with all our heart.” But when we lose our passion for life, when a deadness sets in which we cannot...