One of the world's leading theologians offers important insights into the history and significance of Christian creeds. "A work of keen insight, great learning, and ecumenical generosity."--Robert Louis Wilken, First Things "[Pelikan's] book is learned, indeed massively so, yet because of the lucidity of its prose it is accessible to the general reader."--Luke Timothy Johnson,Washington Post Book World "Indispensable. . . . An achievement unlikely to be surpassed."--Donald K.McKim, Theological Studies