Divine simplicity is the idea that, as the ultimate principle of the universe, God must be a non-composite unity not made up of parts or diverse attributes. Radde-Gallwitz explores how this idea was appropriated by early Christian theologians from non-Christian philosophy with particular reference to Basil of Caesarea and Gregory of Nyssa.

Turcescu offers an in-depth analysis of Gregory's writings about the divine persons. Turcescu's work not only contributes to our knowledge of the history of Trinitarian theology but can be helpful to theologians who are dealing with issues in contemporary ethics.

Gregory of Nyssa is firmly established in today's theological curriculum and is a major figure in the study of late antiquity. Students encounter him in anthologies of primary sources, in surveys of Christian history and perhaps in specialized courses on the doctrine of the Trinity, eschatology, asceticism, or the like. Gregory of Nyssa's Doctrinal Works presents a reading of the works in Gregory's corpus devoted to the dogmatic controversies of his day. Andrew Radde-Gallwitz focuses as much on Gregory the writer as on Gregory the dogmatic theologian. He sets both elements not only within the context of imperial legislation and church councils of Gregory's day, but also within their proper religious context-that is, within the temporal rhythms of ritual and sacramental practice. Gregory himself roots what we call Trinitarian theology within the church's practice of baptism. In his dogmatic treatises, where textbook accounts might lead one to expect much more on the metaphysics of substance or relation, one finds a great deal on baptismal grace; in his sermons, reflecting on the occasion of baptism tends to prompt Trinitarian questions.

Basil of Caesarea is considered one of the architects of the Pro-Nicene Trinitarian doctrine adopted at the Council of Constantinople in 381, which eastern and western Christians to this day profess as ""orthodox."" Nowhere is his Trinitarian theology more clearly expressed than in his first major doctrinal work, Against Eunomius, finished in 364 or 365 CE. Responding to Eunomius, whose Apology gave renewed impetus to a tradition of starkly subordinationist Trinitarian theology that would survive for decades, Basil's Against Eunomius reflects the intense controversy raging at that time among Christians across the Mediterranean world over who God is. In this treatise, Basil attempts to articulate a theology both of God's unitary essence and of the distinctive features that characterize the Father, Son, and Holy Spirit--a distinction that some hail as the cornerstone of ""Cappadocian"" theology. In Against Eunomius, we see the clash not simply of two dogmatic positions on the doctrine of the Trinity, but of two fundamentally opposed theological methods. Basil's treatise is as much about how theology ought to be done and what human beings can and cannot know about God as it is about the exposition of Trinitarian doctrine. Thus Against Eunomius marks a turning point in the Trinitarian debates of the fourth century, for the first time addressing the methodological and epistemological differences that gave rise to theological differences. Amidst the polemical vitriol of Against Eunomius is a call to epistemological humility on the part of the theologian, a call to recognize the limitations of even the best theology. While Basil refined his theology through the course of his career, Against Eunomius remains a testament to his early theological development and a privileged window into the Trinitarian controversies of the mid-fourth century.

In The Filioque Reconsidered, Chungman Lee offers a concise yet thorough evaluation of the contemporary discussion on the filioque and examines the trinitarian theologies of Gregory of Nyssa and Augustine of Hippo.

Gregory of Nyssa is firmly established in today's theological curriculum and is a major figure in the study of late antiquity. Students encounter him in anthologies of primary sources, in surveys of Christian history and perhaps in specialized courses on the doctrine of the Trinity, eschatology, asceticism, or the like. Gregory of Nyssa's Doctrinal Works presents a reading of the works in Gregory's corpus devoted to the dogmatic controversies of his day. Andrew Radde-Gallwitz focuses as much on Gregory the writer as on Gregory the dogmatic theologian. He sets both elements not only within the context of imperial legislation and church councils of Gregory's day, but also within their proper religious context-that is, within the temporal rhythms of ritual and sacramental practice. Gregory himself roots what we call Trinitarian theology within the church's practice of baptism. In his dogmatic treatises, where textbook accounts might lead one to expect much more on the metaphysics of substance or relation, one finds a great deal on baptismal grace; in his sermons, reflecting on the occasion of baptism tends to prompt Trinitarian questions.

In his commentary on Gregory of Nyssa’s Adversus Macedonianos, Piet Hein Hupsch highlights the carefully composed structure of this work and the important connection between its theological, rhetorical and stylistic elements. In his capacity of arbiter fidei, which was bestowed upon him by the Council of Constantinople in 381, Bishop Gregory wrote this circular letter in the form of a counteraccusation against the Pneumatomachi, developing his Trinitarian theology of adoration in which the Spirit occupies a central role. In a systematic-theological synthesis of this work, Hupsch shows how the Spirit draws baptised human beings and human language into the relatio of the three divine persons, the dynamic circle of divine glory of which the Spirit is the personification.

Basil of Caesarea’s debate with Eunomius of Cyzicus in the early 360s marks a turning point in the fourth-century Trinitarian controversies. It shifted focus to methodological and epistemological disputes underlying theological differences. This monograph explores one of these fundamental points of contention: the proper theory of names. It offers a revisionist interpretation of Eunomius’s theory as a corrective to previous approaches, contesting the widespread assumption that it is indebted to Platonist sources and showing that it was developed by drawing upon proximate Christian sources. While Eunomius held that names uniquely predicated of God communicated the divine essence, in response Basil developed a “notionalist” theory wherein all names signify primarily notions and secondarily properties, not essence.

This book offers a theological, and more specifically ecclesiological, response to the philosophical problem of divine hiddenness. It engages with philosopher J.L. Schellenberg’s argument on hiddenness and sets out a theologically rich and fresh response, drawing on the ecclesiological thought of Gregory of Nyssa. With careful attention to Gregory’s work, the book shows how certain ecclesiological problems and themes are critical to the hiddenness argument. It looks to the gathered church (the church as the body of Christ) and the scattered church (the church as the image of God) for relevance to the hiddenness problem. The volume will be of interest to scholars of theology and philosophy, particularly analytic theologians and philosophers of religion.

A confluence of scholarly interest has resulted in a revival of Thomistic scholarship across the world. Several areas in the investigation of St. Thomas Aquinas, however, remain under-explored. This volume contributes to two of these neglected areas. First, the volume evaluates the contemporary relevance of St. Thomas's views for the philosophy and practice of education. The second area explored involves the intersections of the Angelic Doctor’s thought and the numerous cultures and intellectual traditions of the East. Contributors to this section examine the reception, creative appropriation, and various points of convergence between St. Thomas and the East.