I would like one day, Hans Urs von Balthasar wrote in 1952, to write a book on Ignatius of Loyola, the saint of whom I will always consider myself the least of sons. The Jesuit-formed theologian from Switzerland--widely considered one of the greatest thinkers and spiritual writers of modern times--never got the chance to fulfill this dream. Instead, Balthasar's whole theology, from Theo-Drama to Dare We Hope That All Men Be Saved,...