Commentary on the Gospel according to John
St Cyril of Alexandria · c. 425 AD
Library of Fathers (Pusey), P. E. Pusey (and continuators), Library of Fathers, Oxford / James Parker, 1874–1885; transcribed by Roger Pearse, tertullian.org.
Patriarch of Alexandria (412–444) and the chief architect of Orthodox Christology. He led the Council of Ephesus (431), which condemned Nestorius and dogmatically affirmed the Theotokos. His Twelve Anathemas, his Letters to Nestorius and to John of Antioch (the Formula of Reunion), and his major Christological treatises shaped the conciliar definitions of Ephesus and Chalcedon. The Orthodox tradition receives him as one of the Three Holy Hierarchs of Christological doctrine — alongside Athanasius and the Cappadocians.