The German Romantic theologian and philosopher Schleiermacher wrote, The virtuosity (or special calling) of a person is at the same time the melody of that person's life, and it remains a simple, meager series of notes unless religion, with its endlessly rich variety, accompanies it with all notes and raises the simple song to a full-voiced, glorious harmony. It is around this melody that Jaroslav Pelikan, a great theologian of our own day, weaves...