Selected by Kelly M. Kapic, professor of theological studies at Covenant College and the author of The God Who Gives: How the Trinity Shapes the Christian Story (Zondervan).

On The Trinity (De Trinitate)


This book is not for the faint of heart, but it is hard to imagine a more influential (and misunderstood!) work on the Trinity. Its brilliance owes not merely to what Augustine says, but how he says it: blending careful philosophical reflection with deep theological understanding, all while fitting in pastoral applications. His movement from contemplating God to the inner life of humans is creative and stimulating, even if at times it raises as many problems as it solves.

On God and Christ

Gregory of Nazianzus

As one of the Cappadocian Fathers, Gregory deeply influenced not only the East but also Western Trinitarian theology. While relatively brief, this collection of writings advances a carefully built argument that the one God is eternally the Father, Son, and Spirit. Gregory’s focus on the humanity of Christ is wonderfully helpful for Christians who want to understand how their Trinitarian beliefs relate to the Incarnation of the Son.

Communion with the Triune God

John Owen

Owen, the English Puritan theologian, stresses that there is no “God” behind the “gods”: In other words, the Father, Son, and Spirit do not point to something beyond themselves—to an undifferentiated deity. The living God is none other than the three persons in eternal communion. Drawing from Paul’s benediction in 2 Corinthians 13:14, Owen calls us to rest in the love of the Father through the grace of the Son in the fellowship of the Spirit.

The Trinitarian Faith

T. F. Torrance

I love this book for many reasons, maybe because it almost functions as a collection of early church statements arranged in a creative way, or maybe because Torrance demonstrates how our faith is necessarily triune and how that truth shapes our particular view of godliness and what it means to be the church. While not an easy read (the text is often peppered with untranslated Greek and Latin), this book will lead readers into the great Christian tradition that links together God’s being, divine revelation, and our worship.

Delighting in the Trinity: An Introduction to Christian Faith

Michael Reeves

If even the thought of books on the Trinity scares you, this is the one I would recommend. Reeves, president of Union School of Theology in Oxford, pulls off an amazing feat, discussing the Trinity in a way that is witty, practical, and deeply informed by the orthodox tradition but without overwhelming readers in the process. There are even pictures!

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