Catechetical Resources of the Early Church

The Enchiridion 122.33 | Nicene and Post-Nicene Fathers 1.3: St. Augustin: On the Holy Trinity, Doctrinal Treatises, Moral Treatises

On Christian Doctrine | Nicene and Post-Nicene Fathers 1.2: St. Augustin’s City of God and Christian Doctrine

Page lix | Nicene and Post-Nicene Fathers 2.7: S. Cyril of Jerusalem, S. Gregory Nazianzen

Conferences 1 | Nicene and Post-Nicene Fathers 2.11: Sulpitius Severus, Vincent of Lérins, John Cassian

An Exact Exposition of the Orthodox Faith | Nicene and Post-Nicene Fathers 2.9: St. Hilary of Poitiers, John of Damascus