I. He reminds Pulcheria of her former services to the Church, and suggests her interference in the Eutychian controversy.
How much protection the Lord has extended to His Church through your clemency, we have often tested by many signs. And whatever stand the strenuousness of the priesthood has made in our times against the assailers of the Catholic Truth, has redounded chiefly to your glory: seeing that, as you have learned from the teaching of the Holy Spirit, you submit your authority in all things to Him, by whose favour and under whose protection you reign. Wherefore, because I have ascertained from my brother and fellow bishop Flavian's report, that a certain dispute has been raised through the agency of Eutyches in the church of Constantinople against the integrity of the Christian faith (and the text of the synod's minutes has shown me the exact nature of the whole matter), it is worthy of your great name that the error which in my opinion proceeds rather from ignorance than ingenuity, should be dispelled before, with the pertinacity of wrong-headedness, it gains any strength from the support of the unwise.
Because even ignorance sometimes falls into serious mistakes, and very frequently the simple-minded rush through unwariness into the devil's pit: and it is thus, I believe, that the spirit of falsehood has crept over Eutyches: so that, while he imagines himself to appreciate the majesty of the Son of God more devoutly, by denying in Him the real presence of our nature, he came to the conclusion that the whole of that Word which “became flesh” was of one and the same essence. And greatly as Nestorius fell away from the Truth, in asserting that Christ was only born man of His mother, this man also departs no less far from the Catholic path, who does not believe that our substance was brought forth from the same Virgin: wishing it of course to be understood as belonging to His Godhead only; so that that which took the form of a slave, and was like us and of the same form, was a kind of image, not the reality of our nature.
Source: Letters (New Advent)