Council of Ephesus, Cyril of Alexandria: Anathema III

If anyone shall after the [hypostatic] union divide the hypostases in the one Christ, joining them by that connexion alone, which happens according to worthiness, or even authority and power, and not rather by a coming together (συνόδῳ), which is made by natural union (ἕνωσιν φυσικὴν):  let him be anathema.

Edition and transmission

Cyril of Alexandria authored this text. The source editor discusses uncertainty about its formal approval at Ephesus and its subsequent conciliar reception. It is preserved as received doctrinal material, not as an undisputed text newly authored by the council.

Translation: Henry R. Percival, The Seven Ecumenical Councils, NPNF II.14 (1900), via CCEL.