Appian Way Press

On the Trinity: de Trinitate

by Saint Augustine

Written over many years, On the Trinity represents Augustine’s most sustained effort to articulate the Christian confession of one God in three persons. The early books focus on the biblical foundations of Trinitarian doctrine, examining key passages that address the unity and distinction of the Father, Son, and Holy Spirit within the life and teaching of the Church. In the later books, Augustine turns to a series of analogies drawn from human experience, especially from the operations of the mind, memory, understanding, and love. These reflections are offered not as solutions to the mystery of God, but as disciplined ways of thinking that lead the reader toward greater theological depth and humility.