Canonised Father of the Church

Cyril of Alexandria

Also known as the Seal of the Fathers

Archbishop of Alexandria and the decisive figure at Ephesus, whose insistence on the one incarnate subject of Christ became the Church's own; a great theologian whose conduct has been criticised since his own lifetime.

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Dates
around 376 - 444 — Died on 27 June 444.
Region
Egypt
See
Alexandria
Language of composition
Greek
Commemoration
9 June, and 18 January with Athanasius (Orthodox Church in America and other Orthodox jurisdictions) — Julian-calendar jurisdictions observe these dates thirteen days later on the civil calendar.

Life

Cyril succeeded his uncle Theophilus as archbishop of Alexandria in 412, inheriting a see that had become one of the most powerful institutions in the eastern empire. The early years of his episcopate were violent: conflict with the Jewish community of Alexandria, conflict with the imperial prefect, and the murder of the philosopher Hypatia by a Christian mob in 415.

From 428 he was engaged against Nestorius, and it is his theology of the incarnation that the Council of Ephesus received. In 433 he agreed the Formula of Reunion with John of Antioch, accepting language about two natures that his own earlier letters had not used — an act of theological generosity that his more rigorous supporters disliked.

Works

Generally accepted as authentic

  • Second and third letters to Nestorius, with the twelve anathematisms
  • That Christ Is One — Not archived here.
  • Commentary on the Gospel of John; commentaries on the Old Testament — Not archived here.

Disputed, spurious or lost

  • The formula 'one incarnate nature of God the Word' — Cyril used it believing it came from Athanasius. It comes in fact from Apollinaris, whose Christology the Church condemned. Cyril's own use of it is not Apollinarian, but the misattribution mattered enormously in the century that followed.

Theological and spiritual contribution

Cyril's central insistence is that there is one subject in Christ: the eternal Word, who is the one born, the one who suffers, the one who rises. That is why the theotokos title is not negotiable for him. It is a claim about who Jesus is, not a compliment to his mother.

His theology is the frame within which Chalcedon's two-nature language was later read, and the Fifth Council in 553 made that reading explicit. The Orthodox tradition calls him the Seal of the Fathers for that reason.

The twelve anathematisms are the sharpest form of his case. They were read at Ephesus and were never themselves received as a conciliar definition, and their language caused real difficulty for Antiochene readers — Theodoret wrote against them. Read them as a Father's position in controversy.

Controversy and reception

Cyril's conduct at Ephesus — opening the council before the Syrian bishops arrived, acting as judge in his own cause — was contested at the time and has been ever since. So has his role in the Alexandrian violence of the 410s. The murder of Hypatia was carried out by a mob; Cyril's degree of responsibility is disputed among historians and the sources do not settle it.

Holding this together with his standing as a Father is not a contradiction. The Church receives his theology; it does not thereby canonise his methods, and a page that omitted the criticism would be doing apologetics rather than history.

  • The Council of Ephesus

    The council that confessed the Virgin Mary as Theotokos and condemned Nestorius. Its procedure was contested at the time, and its consequences included the first lasting division in the Church.

    Council

  • The Council of Chalcedon

    The council that confessed Christ in two natures, unconfused and undivided, in one person. Its definition is the classic Christological statement of the Church, and its reception divided the Church permanently.

    Council

  • Jesus Christ, God and man

    One person in two natures: the four councils that worked it out and the four adverbs that guard it.

    Theme

  • The Theotokos

    Why the title given to the Virgin Mary is first of all a statement about her Son.

    Theme

  • Jesus Christ: incarnation, death and resurrection

    One person in two natures, and why four adverbs at Chalcedon still matter.

    Lesson

Your notes

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Sources for this page

  1. Tier C The Seven Ecumenical Councils of the Undivided Church Henry R. Percival (ed.); Philip Schaff and Henry Wace (series eds.) The Epistle of Cyril to Nestorius with the XII Anathematisms annotated edition of conciliar texts Archived in full. Source record (opens in a new tab)
  2. Tier C The Seven Ecumenical Councils of the Undivided Church Henry R. Percival (ed.); Philip Schaff and Henry Wace (series eds.) The Letter of Cyril to John of Antioch annotated edition of conciliar texts The Formula of Reunion of 433. Source record (opens in a new tab)
  3. Tier C The Seven Ecumenical Councils of the Undivided Church Henry R. Percival (ed.); Philip Schaff and Henry Wace (series eds.) The Council of Ephesus: Extracts from the Acts annotated edition of conciliar texts Source record (opens in a new tab)

Tiers are explained in the methodology. No page on this site has been reviewed or approved by any bishop, priest, synod or seminary.