Against Eunomius

work by Basil the Great

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June 17, 2026

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Against Eunomius is a significant work by Basil the Great, a prominent 4th-century Church Father. This treatise was written to defend the orthodox Christian doctrine of the Trinity against the extreme Arianism espoused by Eunomius. Eunomius, a proponent of Arianism, denied the essential divinity of Christ and the Holy Spirit, asserting they were not of the same substance as God the Father. Basil's work aimed to refute these views, particularly emphasizing the deity of the Son and the Holy Spirit, contributing to the broader theological debates of the post-Nicene period.123

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St. Basil the Great
Works and legacy
Against Eunomius defends the deity of the Son against an extreme Arian thinker, and On the Holy Spirit expounds the deity of the Holy Spirit implied in the church’s tradition, though not previously formally defined.
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Against Eunomius defends the deity of the Son against an extreme Arian thinker, and On the Holy Spirit expounds the deity of the Holy Spirit implied in the church’s tradition, though not previously formally defined.
Read More