On the great plains, a thunderstorm is one of nature's fiercest faces. Its terrifying power seems inimical to life. It can and does kill. And yet, in one of the world's great ironies, it also distills life-giving moisture from the heavy air and pelts the earth with what it needs to thrive. Sometimes, the weather rages without; and sometimes, it rages within. When grief and loss crush the human heart, when anguish rips deep furrows in the soul, when...