and Irenaeus, frequently discussed the parallels and contrasts between Christianity, Paganism and other syncretic religions, and answered charges of borrowing from paganism in their apologetical writings. Hellenic influences Stuart G Hall (formerly Professor of Ecclesiastical History at King's College, London) describes the subsequent process of philosophical/theological amalgamation in Doctrine and Practice in the Early Church (1991), where he writes: The neo-Platonic trinities, such as that of the One, the Nous and the Soul, are not considered a trinity necessarily of consubstantial equals as in mainstream Christianity. However, the neo-Platonic trinity has the doctrine of emanation, or "eternal derivation", a timeless procedure of generation having as a source the One and claimed to be paralleled with the generation of the light from the Sun. This was adopted by Origen and later on by Athanasius, and applied to the generation of the Son from the Father, because they believed that this analogy could be used to support the notion that the Father, as immutable, always had been a Father, and that the generation of the Son is therefore eternal and timeless. The synthesis of Christianity with Platonic philosophy was further incorporated in the trinitarian formulas that appeared by the end of the 3rd century. "The Greek philosophical theology" was "developed during the Trinitarian controversies over the relationships among the persons of the Godhead". The allegation of borrowing was raised by some disputants when the Nicene doctrine was being formalized and adopted by the bishops. For example, in the 4th century, Marcellus of Ancyra, who taught the Father, Son, and Holy Spirit were one person (hypostasis), said in his On the Holy Church, 9: In his Introduction to the 1964 book Meditations, the Anglican priest Maxwell Staniforth discussed the profound influence of Stoic philosophy on Christianity. In particular: Again in the doctrine of the Trinity, the ecclesiastical conception of Father, Word, and Spirit finds its germ in the different Stoic names of the Divine Unity. Thus Seneca, writing of the supreme Power which shapes the universe, states, 'This Power we sometimes call the All-ruling God, sometimes the incorporeal Wisdom, sometimes the holy Spirit, sometimes Destiny.' The Church had only to reject the last of these terms to arrive at its own acceptable definition of the Divine Nature; while the further assertion 'these three are One', which the modern mind finds paradoxical, was no more than commonplace to those familiar with Stoic notions. Christian