Love. That’s the expression Mom wears on her face in that photograph. What else could you call it apart from love? And love, this magical thing that’s unique to human beings and can sometimes make us absolutely miserable, is also the thing that buoys the human spirit. Like time, color, temperature, and loneliness, love is one of those things that only humans experience. These things can rule over or control us, but they also allow us to live more fully. They are precisely what make us human.