previous century. The center of debate turned on the nature of the personhood of Christ, and how divine and human characteristics could combine in Jesus without rendering his subjectivity hopelessly divided, or without reducing his authentic humanness to an insubstantiality.These arguments soon polarized into the conflict between two great churches, Alexandria and Constantinople, and their powerful archbishops, St Cyril (d. 444) and Nestorius (d. ca. 452) respectively. Cyril is, arguable, the most important patristic theologian ever to deal with the issues of Christology. The text here translated is one of his most important and approachable writings, composed in the aftermath of the Council of Ephesus (431) to explain his doctrine to an international audience. He argues here for the single divine presence but fostered and enhanced by it. Accordingly, for St Cyril, Christology becomes a paradigm for the transfigured and redeemed life of the Christian.This book is essential reading for all those interested in the theology and spirituality of the fathers, in the ancient church's use of scripture, and the way in which the church once creatively expressed its thinking through the media of philosophy and the natural sciences.John Anthony McGuckin, an Orthodox theologian, is Reader in Patristic and Byzantine Theology at the University of Leeds, England, and a Fellow of the Royal Historical Society, London. His previous books include: St Symeon the New Theologian: Chapters and Discourses; The Transfiguration of Christ in Scripture and Tradition; Selected Poems of St Gregory Nazianzen; St Cyril of Alexandria and the Christological Controversy; and Byzantium and Other Poems.

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