basil
De Spiritu Sancto
Basil's classic defence of the Holy Spirit's full divinity, argued from Scripture and the church's own worship.
The Hexæmeron
Nine sermons on the six days of creation, full of close observation of the natural world and praise of its Maker.
The Letters
A wide correspondence of counsel, comfort, church business, and friendship, from one of the ancient world's great letter-writers.