One of Moltmann’s great strengths as a theologian is that he wasn’t brought up in the church. He came to faith as a young adult and approached it with fresh eyes. As a German soldier he was taken prisoner in World War II, and in the prisoner-of-war camp he discovered the Bible for the first time. “I have never decided for Christ once and for all, as is often demanded of us,” he says. “I have decided again and again in specific terms for the discipleship of Christ when situations were serious and it was necessary.” In his case, biography is theology. Along the way the reader gets a refresher course in late-20th-century theology.