This Episode is simply titled “Leo”While there’d been several bishops of the church at Rome who’d been capable leaders and under their guidance had established Rome as the premier church, if not the whole Christian world, at least in the western portion of the now declining Roman Empire, it can be fairly said that for most of the earlier bishops the person was eclipsed by the office. Bishops Callistus, Stephen, Damasus, & Innocent I all added significant authority to the Roman See. But it was Leo the Great who saw the Bishop of Rome become what we might call the first real Pope. It was with Leo I that the idea of the Papacy became real.While previous bishops at Rome had certainly been theologically astute, as befitted their office, Leo can be classed as a first-rate theologian, arguably the greatest theologian of any who came before in that office and for a century & a half after. He battled the Manichæan, Priscillianist, & Pelagian heresies, and won enduring fame for helping to finish codifying the orthodox doctrine of the person of Christ.Leo’s early life is shrouded in mystery. The chief source of information about him comes from his letters & they don’t commence till AD 442 when he was already an adult. Leo was mostly likely a Roman who became a deacon, then a legate under Bishops Celestine I & Sixtus III. A legate is a special messenger, sent by a bishop, to carry messages to civil rulers. Think à Church ambassador to the king. Leo was so astute in his task as a representative for the Church, Emperor Valentinian III sent him on a special mission to settle a dispute in Gaul between a couple feuding generals. This was at a time of great turmoil in the north due to the barbarian threat. While Leo was on this peace-making mission, Bishop Sixtus died and Leo was chosen to take his seat. He served for the next 21 years.Leo describes his feelings at the assumption of his office in a sermon;“Lord, I have heard your voice calling me, and I was afraid: I considered the work which was enjoined on me, and I trembled. For what proportion is there between the burden assigned to me and my weakness, this elevation and my nothingness? What is more to be feared than exaltation without merit, the exercise of the most holy functions being entrusted to one who is buried in sin? Oh, you have laid upon me this heavy burden, bear it with me, I beseech you be you my guide and my support.”Leo’s papacy faced 2 immense problems.First:  The emergence of heresies threatened the integrity of the Church; and àSecond: The political disintegration of the Western Roman Empire.Leo offered 3 tactics in dealing with these difficulties à1)    Actions to provide essential church doctrine with a clear, orthodox position;2)    Efforts to unify church government under a sovereign papacy; and3)   Attempts at peace by negotiating with the Empire’s enemies.On the doctrinal front, Leo theologically refuted the era’s main heresies & utilized imperial criminal prosecution & banishment to get rid of unrepentant heretics. Leo’s finest achievement was probably the formation and acceptance of an orthodox Christological dogma.Though Arianism was in retreat, the 5th C battled with what’s called Eutychianism. We’re going to get into this in more depth in a soon coming episode so for now let me just say that Eutychianism was one of the 4th & 5th Cs’ attempts to understand the nature of Jesus. Was He God, Man or both? And if both, how do the 2 nature relate to each other? Eutychianism said Jesus had 2 natures, human & divine, but that the divine had completely dominated the human, like a drop of vinegar is overwhelmed by the sea. Later it will come to be known by a label you may have heard = Monophysitism.Leo’s manner of dealing with this aberrant teaching was brilliant. Rather than rely on suppression, he brought it’s main advocate, Eutychus, to Rome for lengthy discussions and, aft