Several years ago, I realized that, for a long time, I had been fighting back tears whenever I would see children run gleefully around a playground or hear them squeal with delight as they played, or notice their wonder over wildflowers, squirrels, and birdsong. It would happen, too, when I listened to a choir of children sing at the top of their lungs without embarrassment or when I saw a kids’ soccer team take the field with buoyant energy.