When the Roman emperor Theodosius approached the wooden doors of the Milan cathedral, a man stood in his way. It was the bishop himself, St. Ambrose. "You shall not enter." He told him. The men stood face to face. One was the most powerful man on earth, sitting upon the throne of a mighty marbled empire. With one word, he commanded the Legions. The other was a simple priest. No armies stood behind him; no swords or armor. He only had the message of Christ. Which one would win?