Five Tomes Against Nestorius

On the death of Theophilus, Archbishop of Alexandria, in A. D. 412, his nephew and successor, S. Cyril, comes suddenly before us. For of S. Cyril’s previous life we have only a few scattered notices. We do not know in what year he was born, nor any thing of his parents, nor where he was brought up. That S. Cyril had received a thoroughly good education, is abundantly clear; not only from his very extensive reading, which a mind of such large grasp as S. Cyril’s would ever provide for itself, but that his reading being so well digested implies good early training. The great accuracy of his Theology implies a most accurate Theological education.