Chapter 13 – Athanasius, Ambrose and Arianism

The variety of issues discussed in the Council of Nicaea (325 AD) ranged from how to date Easter to whether to ordain eunuchs as priests, but everything was secondary to settling the Arian controversy. Arius taught that Jesus was made by God and was not divine on the same level as God. Athanasius played a key role in opposing Arianism, condemning it as heresy and emerged as the key figure in the triumph of orthodox theology. Ambrose also continued to oppose heresies in the church. He sold off his family holdings and gave the proceeds to those in need. He opposed the Empress Justina who was a strong supporter of Arianism.

Key Words

Eusebius of Nicomedia, The Bishop of Nicaea, Theognis, Hosius, homoousios, “one substance”, “consubstantial”, “begotten not made”, homoiousios, “of a similar substance”, “semi-Arians”, Roger Olson, Constantine, Constantius, radical subordinationism, Julian, Jovian, Valens, hypostases, Tertullian, “Trinitarian formula, una substantia, tres personae”, Justo Gonzalez, Frances Young, St. Ambrose, the Bishop of Milan, Auxentius, Valentinian, Empress Justina, Theodosius