This book attempts to resolve one of the oldest and bitterest controversies between the Eastern and Western Christian churches: namely, the dispute about the doctrine of deification. A. N. Williams examines two key thinkers, each of whom is championed as the authentic spokesman of his own tradition and reviled by the other. Taking Aquinas as representative of the West and Gregory Palamas for the East, she presents fresh readings of their work that both reinterpret each thinker and show an area of commonality between them much greater than has previously been acknowledged.

The Architecture of Theology presents a fresh reading of Christian theology, re-interpreting discussions of theological method and considering them in light of contemporary philosophical debates. A. N. Williams re-evaluates the traditional theological warrants (scripture, tradition, and reason) and the concept of systematic theology, arguing that Christian theology is inherently systematic, reflecting the rationality and relationality of its two chief subjects, 'God and other things as they are related to God'(Aquinas). The roles of the theological warrants are assessed, showing how they are necessarily interdependent. Contemporary philosophical discussions of the structure of reasoning are also examined; these have conventionally contrasted foundationalist and coherentist accounts. A contemporary consensus has emerged, however, of a chastened foundationalism or hybrid foundationalism-coherentism, in light of which arguments are understood both as reasoning from foundational propositions and as gaining plausibility from the coherence of claims with one another.
The Christian tradition anticipated these developments: theological arguments exhibit a dual structure, with propositions underwritten to some extent by their dependence on scripture and tradition and to some extent by their coherence with one another in integrated webs, or systems. Christian theology is therefore shown to be systematic in its fundamental structure, whether or not a given argument forms part of a 'systematic theology'. The systematicity of Christian theology is related to its subject matter, 'God and other things as they are related to God'. Theology's two chief subjects (God and humanity) are characterised by rationality and relationality.
These are also the qualities of Christian theology itself: it is a double mimesis, reflecting in its very structures of reasoning its subject matter.
The order, harmony and coherence of those structures, however, have an aesthetic appeal which has the potential to appeal for its very beauty, rather than its truth. Williams presents a careful examination of the tradition of theological aesthetics, asking whether the beauty of systematic structures counts for or against theological truth.

A. N. Williams examines the conception of the intellect in patristic theology from its beginnings in the work of the Apostolic Fathers to Augustine and Cassian in the early fifth century. The patristic notion of intellect emerges from its systematic relations to other components of theology: the relation of human mind to the body and the will; the relation of the human to the divine intellect; of human reason to divine revelation and secular philosophy; and from the use of the intellect in both theological reflection and spiritual contemplation. The patristic conception of that intellect is therefore important for the way it signals the character of early Christian theology as both systematic and contemplative and as such, distinctive in its approach from secular philosophies of its time and modern Christian theology.

A. N. Williams examines the conception of the intellect in patristic theology from its beginnings in the work of the Apostolic Fathers to Augustine and Cassian in the early fifth century. The patristic notion of intellect emerges from its systematic relations to other components of theology: the relation of human mind to the body and the will; the relation of the human to the divine intellect; of human reason to divine revelation and secular philosophy; and from the use of the intellect in both theological reflection and spiritual contemplation. The patristic conception of that intellect is therefore important for the way it signals the character of early Christian theology as both systematic and contemplative and as such, distinctive in its approach from secular philosophies of its time and modern Christian theology.