Career
In 417 or 418 he was in Rome where he wrote two anti-Pelagian treatises, which he submitted to Augustine of Hippo. From 429 until about 448 he was in Constantinople. They were also edited by Baluze (Paris, 1684), reprinted with corrections in Andrea Gallandi, "Bibliotheca veterum Patrum", VIII (Venice, 1772), 613-738.
His treatises "Commonitorium super nomine Cælestii", and "Commonitorium adversus hæresim Pelagii et Cælestii vel etiam scripta Juliani" are against the Pelagians.
The former effected the expulsion of Julian of Eclanum and Cælestius from Constantinople and their condemnation at Ephesus in 431. Against the Nestorians he wrote Epistola de discrimine inter hæresim Nestorii et dogmata Pauli Samosateni, Ebionis, Photini atque Marcelli and Nestorii blasphemiarum capitula XII. Among his translations are extracts from Cyril of Alexandria, Nestorius, Theodore of Mopsuestia, Theodoret, Pelagius, and others
