Aëtius of Antioch

This article is about the 4th-century AD theologian. For the 1st-century BC philosopher, see Aetius (philosopher).

Aëtius of Antioch (/ˈʃiəs/; Greek: Ἀέτιος ὁ Ἀντιοχεύς; Latin: Aëtius Antiochenus; fl.350), surnamed "the Atheist" by his trinitarian enemies,[1] founder of an Arian Christian movement, was a native of Coele-Syria.[2]

Life and writings

Aëtius grew up in poverty or slavery.[3][4] He later worked as a goldsmith in Antioch to support his widowed mother and studied philosophy. After his mother died, Aëtius continued his trade and extended his studies into the Christian scriptures, Christian theology, and medicine.[3]

After working as a vine-dresser and then as a goldsmith, he became a traveling doctor, and displayed great skill in disputations on medical subjects; but his controversial power soon found a wider field for its exercise in the great theological question of the time. He studied successively under the Arians, Paulinus, bishop of Antioch, Athanasius, bishop of Anazarbus, and the presbyter Antonius of Tarsus. In 350 he was ordained a deacon by Leontius of Antioch, but was shortly afterwards forced by the trinitarian party to leave that town. At the first synod of Sirmium he won a dialectic victory over the homoiousian bishops, Basilius and Eustathius, who sought in consequence to stir up against him the enmity of Constantius Gallus. In 356 he went to Alexandria with Eunomius in order to advocate Arianism.[5] Here he is said to have debated Manichean Aphthonius of Alexandria so vigorously that the latter died after the encounter.[6] Aëtius was afterwards banished from Alexandria by Constantius II. Julian recalled him from exile, bestowed upon him an estate in Lesbos, and retained him for a time at his court in Constantinople. Being consecrated a bishop, he used his office in the interests of Arianism by creating other bishops of that party. At the accession of Valens (364), he retired to his estate at Lesbos, but soon returned to Constantinople, where he died in 367.[5]

Anomoean sect

The Anomoean sect of the Arians, of whom he was the leader, are sometimes called after him Aetians. His work De Fide has been preserved in connection with a refutation written by Epiphanius (Haer. lxxvi. 10). Its main thought is that the homoousia, i.e. the doctrine that the Son (therefore the Begotten) is essentially God, is self-contradictory, since the idea of unbegottenness is just that which constitutes the nature of God.[5]

In one of his treatises, Saint Basil the Great writes against the Anomoeans led by Aëtius, whom he describes an instrument in the hands of "the enemy of truth".[7] Aëtius is said to have been the first to articulate the doctrine that the Father and the Only Begotten Son do not share the same divine substance.


  1. La Grande Encyclopédie
  2. Philostorgius, in Photius, Epitome of the Ecclesiastical History of Philostorgius, book 3, chapter 15.
  3. 1 2 Philostorgius, in Photius, Epitome of the Ecclesiastical History of Philostorgius, book 3, chapter 15.
  4. Basil of Caesarea, Against Eunomius, book 1, chapter 6.
  5. 1 2 3  One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Aetius". Encyclopædia Britannica. 1 (11th ed.). Cambridge University Press. p. 298.
  6. Philostorgius, book III, chapter 15 (2007: 54). Translated by Amidon, Philip R.. "Philostorgius: Church History". Writings from the Greco-Roman world. Society of Biblical Literature (23): 54. ISBN 9781589832152. ISSN 1569-3600.
  7. Against Eunomius, Book I


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