On the Holy Spirit and the treatise against Eunomius defend Nicene worship. His Longer and Shorter Rules, and his letters, shaped eastern monastic life.
Writings
- Address to Young Men on Reading Greek Literature (De legendis gentilium libris)
- Against Those Who Calumniate Us as Saying Three Gods (Letter 189 to Eustathius)
- Canonical Letters to Amphilochius (Letters 188, 199, 217)
- Homilies on the Hexaemeron
- Letter to Bishop Optimus (Letter 260)
- Letter to His Brother Peter on the Difference Between Ousia and Hypostasis (Letter 38)
- Letter to the Italians and Gauls (Letter 92)
- Letters
- Letters Between Emperor Julian and Basil (Letter 360)
- On the Holy Spirit