Letter 121: The Lord who watches over and governs all things has now demonstrated both the apostolic truth of my teaching and...

To Anatolius the Patrician, The Lord who watches over and governs all things has now demonstrated both the apostolic truth of my teaching and the falseness of the slanders hurled against me. The writings sent by the godly and holy lord Leo, archbishop of great Rome, to Flavian of holy memory and to the rest assembled at Ephesus are entirely in harmony with what I myself have written and have always preached in church. As soon as I read them, I praised the loving-kindness of the Lord for not wholly forsaking His churches but preserving the spark of orthodoxy -- or rather, not a spark but a great torch, bright enough to kindle and illuminate the world. In his writings Leo has truly maintained the apostolic standard. In them we find what has been handed down by the holy and blessed prophets and apostles, by their successors in preaching the Gospel, and by the holy Fathers assembled at Nicaea [325 AD]. By these teachings I stand, and I indict all who hold other doctrines as guilty of impiety. I have placed one of the letters Leo sent to Ephesus alongside my own writings, so that when your excellency reads them you may remember the things I have often said in church, recognize the harmony of our doctrines, and despise both the liars and those who have set up their new heresy in opposition to apostolic teaching.

Letter 121