ABSTRACT
Many of the most well-known Protestant systematic theologies, particularly in the Reformed tradition, display a common thematic division. There are prolegomena: questions about the nature of theology, the relationship between faith and reason, and the attributes of scripture and its role in faith and practice. There is the doctrine of God: divine attributes, and God's relationship to creation. There is the doctrine of humanity: the nature and post-mortem survival of human persons, and the human condition, including the Fall and human sinfulness. There are parts devoted to the person and work of Christ: most especially, the Incarnation and atonement. This chapter focuses on triunity, the attribute that is at once the most distinctive to Christian theology and the most puzzling. In accord with many others in the Christian tradition, the grasp of perfection can serve as a reliable guide to discovering and understanding other divine attributes.
