Letter to Eusebius of Nicomedia

This letter represents one of the earliest and most direct statements of Arian theology, written by the Alexandrian presbyter Arius to his former fellow student Eusebius, who had become bishop of Nicomedia. Composed around 318 CE as controversy erupted in Alexandria over Arius's teaching about Christ's relationship to the Father, the letter seeks to win powerful episcopal support for views that Bishop Alexander of Alexandria was condemning as heretical.

Arius presents his theological position with remarkable clarity and confidence. He argues that the Son, while divine, is subordinate to the Father in being and dignity—"there was when he was not." The Son is the first and greatest of God's creatures, through whom all other things were made, but he remains fundamentally different in essence from the unbegotten Father. Arius portrays himself and his supporters as defenders of biblical monotheism against those who would compromise God's absolute unity, claiming that his opponents effectively worship two gods. He appeals to scriptural passages emphasizing the Son's dependence on the Father and requests Eusebius's influence with other bishops to gain broader acceptance for these teachings.

Preserved primarily through quotations by later orthodox writers who sought to refute it, this letter provides invaluable insight into the theological crisis that would ultimately produce the Council of Nicaea and the Nicene Creed. It reveals how sophisticated and scripturally grounded Arian arguments appeared to their proponents, helping modern readers understand why this controversy consumed the fourth-century church and required such careful theological work to resolve. The letter remains essential reading for anyone studying the development of Trinitarian doctrine, the Arian controversy, or the dynamics of early Christian theological dispute.

Who should read this: Students of early Christian theology and church history who want to understand Arianism from primary sources, and those examining how theological controversies develop and spread through ecclesiastical networks.