Book excerpt: This innovative book discloses Karl Rahner's foremost achievement: discovering and delineating an ethos of Catholicism, a multi-faceted and comprehensive approach to life in Christ. Karl Rahner's Theological Aesthetics does so by placing the German Jesuit and his teacher, philosopher Martin Heidegger, into a richly detailed dialogue on aesthetics. The book treats classic Rahner topics such as anthropology and Christology. But it breaks new ground by exploring themes such as angels, Mary, and the apocalypse, juxtaposed with analogous philosophical topics in Heidegger.