Gregory, a bishop of Nyssa in 371, was part of the Cappadocian trio, and was instrumental in the development of Trinitarian orthodoxy. His theological prowess proved vital in response to the Arian and Sabellian heresies. Key to Gregory’s theology we find “an emergence of a pro-Nicene ‘grammar’ of divinity through his developed account of divine power,” [1] conceived through a nature-power-activity formulation revealed in the created order and articulated in Scripture. Understanding the Triune God in this manner afforded a conception of the Trinity that was logical and thoroughly biblical. And this letter is paradigmatic on Gregory’s account of the divine nature. (* This article was later published with Credo Magazine, titled, “ The Grammar of Divinity (On Theology). ” See link below) To Ablabius, though short, is a polemical address whereby Gregory lays out a complex argument in response to the claim that three Divine Persons equal three gods. Basically put, Ablabius (his opponent,...