Read the letter, which is in accord with what is published in the Catholic Encyclopedia, “we ourselves who were and are of the same opinion” and “hath removed all confusion from our minds, and hath so recalled peach to the whole world and to the Church”:
Vigilius to his beloved brother Eutychius.
…so that we ourselves who were and are of the same opinion as they touching the faith, went apart into discord, brotherly love being despised. But since Christ our God, who is the true light, whom the darkness comprehendeth not, hath removed all confusion from our minds, and hath so recalled peace to the whole world and to the Church, so that what things should be defined by us have been healthfully fulfilled through the revelation of the Lord and through the investigation of the truth.
Therefore, my dear brothers, I do you to wit, that in common with all of you, our brethren, we receive in all respects the four synods, that is to say the Nicene, the Constantinopolitan, the first Ephesian, and the Chalcedonian; and we venerate them with devout mind, and watch over them with all our mind. And should there be any who do not follow these holy synods in all things which they have defined concerning the faith, we judge them to be aliens to the communion of the holy and Catholic Church.
Wherefore on account of our desire that you, my brothers, should know what we have done in this matter, we make it known to you by this letter. For no one can doubt how many were the discussions raised on account of the Three Chapters, that is, concerning Theodore, sometime bishop of Mopsuestia, and his writings, as well as concerning the writings of Theodoret, and concerning that letter which is said to have been written by Ibas to Maris the Persian: and how diverse were the things spoken and written concerning these Three Chapters. Now if in every business sound wisdom demands that there should be a retractation of what was propounded after examination, there ought to be no shame when what was at first omitted is made public after it is discovered by a further study of the truth. [And if this is the case in ordinary affairs] how much more in ecclesiastical strifes should the same dictate of sound reason be observed? Especially since it is manifest that our Fathers, and especially the blessed Augustine, who was in very sooth illustrious in the Divine Scriptures, and a master in Roman eloquence, retracted some of his own writings, and corrected some of his own sayings, and added what he had omitted and afterward found out. We, led by their example never gave over the study of the questions raised by the controversy with regard to the before-mentioned Three Chapters, nor our search for passages in the writings of our Fathers which were applicable to the matter.
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Therefore we anathematize and condemn the aforesaid impious Three Chapters, to-wit, the impious Theodore of Mopsuestia and his impious writings; And all that Theodoret impiously wrote, as well as the letter said to have been written by Ibas, in which are contained the above mentioned profane blasphemies. We likewise subject to anathema whoever shall at any time believe that these chapters should be received or defended; or shall attempt to subvert this present condemnation.
And further we define that they are our brethren and fellow-priests who ever keep the right faith set forth by those afore-mentioned synods, and shall have condemned the above-named Three Chapters, or even do now condemn them.
And further we annul and evacuate by this present written definition of ours whatever has been said by me (
a me) or by others in defence of the aforesaid Three Chapters.
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christianbookshelf.org/schaff/the_seven_ecumenical_councils/the_decretal_letter_of_pope.htm