Augustine’s first conversion is to the Christian Platonism of his day, which brought along with it a free-will defence to the problem of evil. Formative as this philosophical influence was, however, Augustine’s own experience of sin combines with his sense of God’s sovereignty to lead him to modify the views he inherited in significant ways. This transformation is demonstrated by setting Augustine’s evolving position against that of Gregory of Nyssa.

Responding to the complicated conditions produced by both the Constantinian Revolution and the collapse of the Roman Empire in the West, Augustine concerned himself not so much with “earthly transitions” as with the only transition that he believed had final significance: the transition of Christ from death to life.