The Orthodox Faith is the classic epitome of the Early Greek Fathers. Writing just before the last of the truly Ecumenical Councils (787), he remains to this day, the last of the Eastern theologians whole-heartedly received by the West. This work, then, is an ecumenical touchstone that remains authoritative in Eastern Orthodoxy, Roman Catholicism (through Peter Lombard's Sentances) and in all Reformation Churches interested in purging late medieval accretions and returning to the developed orthodoxy of Creedal Christianity.