Hilary of Poitiers

Hilary of Poitiers was a fourth-century bishop and theologian who defended the Nicene understanding of Christ against Arianism. His writings helped shape Latin Trinitarian theology.

Arianism: A Christian theological position that regards the Son as subordinate to the Father and not coeternal with him. Hilary’s central polemical target denied the Son’s full divinity.
On the Trinity: Hilary of Poitiers’s theological treatise defending the Son’s divinity and explaining the Trinity. This major work gives his sustained response to Arian readings of Scripture.
Poitiers: A city in western Gaul, now in France, that was an early center of Hilary’s episcopal career. Hilary served as bishop there before his exile and later return.
De synodis: Hilary’s work explaining eastern church councils and the doctrinal formulas debated in the Arian controversy. It shows his effort to reconcile anti-Arian bishops divided by terminology.
Nicene Creed: A Christian creed that affirms the Son is of one substance with the Father. Hilary defended the creed’s account of the Son against Arian interpretations.
Exile of Hilary of Poitiers: Hilary’s banishment to Phrygia by Emperor Constantius II during the fourth-century Arian controversy. Exile brought him into contact with eastern theological debates that sharpened his arguments.
Council of Béziers: A church council in Gaul associated with the condemnation and exile of Hilary of Poitiers. The council’s decision marked the institutional conflict that sent Hilary east.
Augustine of Hippo: A late-fourth- and early-fifth-century Christian bishop and theologian whose works shaped Western Christianity. Augustine inherited a Latin theological tradition to which Hilary’s writing had contributed.
Homoousion: The Greek term meaning “of the same substance,” used at Nicaea to describe the Son’s relation to the Father. This contested word stands at the center of the theological dispute Hilary addressed.
Biblical exegesis: The interpretation of biblical texts to explain their meaning and significance. Hilary grounded his account of the Son in close readings of Scripture.

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Martin of ToursRelated: Hilary ordained Martin and helped shape his early clerical career.