Luigi Gioia provides a fresh description and analysis of Augustine's monumental treatise, De Trinitate, working on a supposition of its unity and its coherence from structural, rhetorical, and theological points of view. The main arguments of the treatise are reviewed first: Scripture and the mystery of the Trinity; discussion of 'Arian' logical and ontological categories; a comparison between the process of knowledge and formal aspects of the confession of the mystery of the Trinity; an account of the so called 'psychological analogies'. These topics hold a predominantly instructive or polemical function. The unity and the coherence of the treatise become apparent especially when its description focuses on a truly theological understanding of knowledge of God: Augustine aims at leading the reader to the vision and enjoyment of God the Trinity, in whose image we are created. This mystagogical aspect of the rhetoric of De Trinitate is unfolded through Christology, soteriology, doctrine of the Holy Spirit and doctrine of revelation. At the same time, from the vantage point of love, Augustine detects and powerfully depicts the epistemological consequences of human sinfulness, thus unmasking the fundamental deficiency of received theories of knowledge. Only love restores knowledge and enables philosophers to yield to the injunction which resumes philosophical enterprise as a whole, namely 'know thyself'.

In Say it to God Luigi Gioia provides a welcome encouragement to all those who feel the need to freshen their practice of prayer. For Gioia, prayer is not about methods or techniques, but trusting that God is truly interested in everything that happens to us and wants to hear about it. The book leads the reader into the theological aspects of prayer and how it relates to Christ, to the Holy Spirit and to the Church. This is done without using complex theological concepts but simply through scriptural quotations. Chapters are kept brief intentionally to make the book suitable for daily reading over the Lenten period. With a foreword by the Archbishop of Canterbury, Say it to God demonstrates that the everyday, even the most mundane of tasks and situations, can be applied in deepening our practice of prayer.

Luigi Gioia provides a fresh description and analysis of Augustine's monumental treatise, De Trinitate, working on a supposition of its unity and its coherence from structural, rhetorical, and theological points of view. The main arguments of the treatise are reviewed first: Scripture and the mystery of the Trinity; discussion of 'Arian' logical and ontological categories; a comparison between the process of knowledge and formal aspects of the confession of the mystery of the Trinity; an account of the so called 'psychological analogies'. These topics hold a predominantly instructive or polemical function. The unity and the coherence of the treatise become apparent especially when its description focuses on a truly theological understanding of knowledge of God: Augustine aims at leading the reader to the vision and enjoyment of God the Trinity, in whose image we are created. This mystagogical aspect of the rhetoric of De Trinitate is unfolded through Christology, soteriology, doctrine of the Holy Spirit and doctrine of revelation. At the same time, from the vantage point of love, Augustine detects and powerfully depicts the epistemological consequences of human sinfulness, thus unmasking the fundamental deficiency of received theories of knowledge. Only love restores knowledge and enables philosophers to yield to the injunction which resumes philosophical enterprise as a whole, namely 'know thyself'.

Luigi Gioia's book Say it to God: In Search of Prayer was chosen as the 2018 Archbishop of Canterbury's Lent Book and welcomed by many as an honest, accessible guide to freshen their practice of prayer in the midst of busy modern life.

In Touched by God, Gioia moves on to explore the art of contemplation. He points out that contemplation is not a more advanced way of praying but a silent and loving attentiveness to God which has nothing in common with disembodied, ahistorical and impersonal forms of spirituality.

Contemplation begins when we are touched by God through Scripture and become aware of his presence in us. Gioia shows how this happens concretely in the lives of the characters of the Gospel of John, his chosen guide to learn how to welcome God in our lives and interact with him.

Gioia's way to contemplation takes the reader not only through Scripture but also through plays and novels where God is never mentioned or is seen as absent, distant or even as an enemy. By engaging with both religious and non-religious authors the reader can discover that contemplation is not some kind of spiritual wonderland but coexists with doubts, thrives in the middle of struggles, is discovered even in suffering, dissolves guilt and leads to authentic self-knowledge and compassion for every human being.