Andrew Louth is professor emeritus of patristic and Byzantine studies at Durham University, England, and visiting professor of Eastern Orthodox theology at the Amsterdam Centre of Eastern Orthodox Theology (ACEOT), in the Faculty of Theology, the Free University, Amsterdam. He is also a priest of the Russian Orthodox Diocese of Sourozh (Moscow Patriarchate), serving the parish in Durham. His recent publications include Introducing Eastern Orthodox Theology, Greek East and Latin West, AD 681-1071, Maximus the Confessor, and The Origins of the Christian Mystical Tradition.