By Father Matthew Baker In his first book against the Arian heretic Eunomius of Cyzicus (d. 393), St Gregory of Nyssa (333-393) demonstrates a balanced appreciation for both the limitations and the importance of rational argument in theology. Modestly denying his own philosophical powers, he observes that “there are thousands in the Church who are strong in philosophical skill” (I: 2). Such skill, however, has its efficacy for truth never simply as an individual possession, but solely