Agatho via Athanasius (Schneider) on Heretical Popes

Bishop Schneider (Auxiliary, Astana, Kazakhstan):

Pope Saint Agatho did not let himself be confused and shaken by the lamentable behavior of his predecessor Honorius I, who helped to spread heresy. In spite of this, Pope Agatho kept his supernatural view of the inerrancy of the See of Peter in teaching the Faith, as he wrote to the Emperors in Constantinople:

“This is the rule of the true faith, which this spiritual mother of your most tranquil empire, the Apostolic Church of Christ (the See of Rome), 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 Savior himself, which he uttered in the holy Gospels to the prince of his disciples: saying, “Peter, Peter, behold, Satan hath desired to have you, that he might sift you as wheat; but I have prayed for thee, that thy faith fail not. And when thou art converted, strengthen thy brethren." (Ep.“Consideranti mihi” ad Imperatores)