For this is the rule of the true faith, which this spiritual mother of your most tranquil empire, the Apostolic Church of Christ, has both in prosperity and in adversity always held and defended with energy; which, it will be proved, by the grace of Almighty God, has never erred from the path of the apostolic tradition, nor has she been depraved by yielding to heretical innovations, but from the beginning she has received the Christian faith from her founders, the princes of the Apostles of Christ, and remains undefiled unto the end, according to the divine promise of the Lord and Saviour himself, which he uttered in the holy Gospels to the prince of his disciples: saying, Peter, Peter, behold, Satan has desired to have you, that he might sift you as wheat; but I have prayed for you, that (your) faith fail not. And when you are converted, strengthen your brethren. Let your tranquil Clemency therefore consider, since it is the Lord and Saviour of all, whose faith it is, that promised that Peter’s faith should not fail and exhorted him to strengthen his brethren, how it is known to all that the Apostolic pontiffs, the predecessors of my littleness, have always confidently done this very thing: of whom also our littleness, since I have received this ministry by divine designation, wishes to be the follower, although unequal to them and the least of all. Wherefore the predecessors of Apostolic memory of my littleness, learned in the doctrine of the Lord, ever since the prelates of the Church of Constantinople have been trying to introduce into the immaculate Church of Christ an heretical innovation, have never ceased to exhort and warn them with many prayers, that they should, at least by silence, desist from the heretical error of the depraved dogma, lest from this they make the beginning of a split in the unity of the Church, by asserting one will, and one operation of the two natures in the one Jesus Christ our Lord: a thing which the Arians and the Apollinarists, the Eutychians, the Timotheans, the Acephali, the Theodosians and the Gaianitæ taught, and every heretical madness, whether of those who confound, or of those who divide the mystery of the Incarnation of Christ.