Papers presented at the Thirteenth International Conference on Patristic Studies held in Oxford 1999 (see also Studia Patristica 34, 35, 37 and 38). The successive sets of Studia Patristica contain papers delivered at the International Conferences on Patristic Studies, which meet for a week once every four years in Oxford; they are held under the aegis of the Theology Faculty of the University. Members of these conferences come from all over the world...