Session XIII: The holy council said: After we had reconsidered, according to the promise which we had made to your highness, the doctrinal letters of Sergius, at one time patriarch of this royal God protected city to Cyrus, who was then bishop of Phasius and to Honorius some time Pope of Old Rome, as well as the letter of the latter to the same Sergius, we find that these documents are quite foreign to the apostolic dogmas, to the declarations of the holy Councils, and to all the accepted Fathers, and that they follow the false teachings of the heretics; therefore we entirely reject them, and execrate them as hurtful to the soul. But the names of those men whose doctrines we execrate must also be thrust forth from the holy Church of God, namely, that of Sergius some time bishop of this God-preserved royal city who was the first to write on this impious doctrine; also that of Cyrus of Alexandria, of Pyrrhus, Paul, and Peter, who died bishops of this God preserved city, and were like minded with them; and that of Theodore sometime bishop of Pharan, all of whom the most holy and thrice blessed Agatho, Pope of Old Rome, in his suggestion to our most pious and God preserved lord and mighty Emperor, rejected, because they were minded contrary to our orthodox faith, all of whom we define are to be subject to anathema. And with these we define that there shall be expelled from the holy Church of God and **anathematized Honorius who was some time Pope of Old Rome, because of what we found written by him to Sergius, that in all respects he followed his view and confirmed his impious doctrines./**B]
Session XVI: To Theodore of Pharan, the heretic, anathema! To Sergius, the heretic, anathema! To Cyrus, the heretic, anathema! To Honorius, the heretic, anathema! To Pyrrhus, the heretic, anathema! To Paul, the heretic, anathema!..
Session XVIII: But as the author of evil, who, in the beginning, availed himself of the aid of the serpent, and by it brought the poison of death upon the human race, has not desisted, but in like manner now, having found suitable instruments for working out his will we mean Theodorus, who was bishop of Pharan, Sergius, Pyrrhus…and moreover, Honorius, who was Pope of the elder Rome…), has actively employed them in raising up for the whole Church the stumbling blocks of one will and one operation in the two natures of Christ our true God, one of the Holy Trinity; thus disseminating, in novel terms, amongst the orthodox people, an heresy similar to the mad and wicked doctrine of the impious Apollinaris (Philip Schaff and Henry Wace, Nicene and Post-Nicene Fathers (Grand Rapids: Eerdmans, 1956), Volume XIV, The Seven Ecumenical Councils, pp. 342-344).
The above statements prove that the condemnation of Honorius meets the basic criteria for ex cathedra statements. The following show this to be the case:
The Council condemns him specifically as a heretic and anathematized him in his official capacity as pope and not as a private theologian.
He is condemned for following after and confirming the heresy of montheletism.
He is condemned for actively disseminating and propagating heretical teachings in his official capacity as pope which affected the whole Church.
To suggest that the Sixth Ecumenical Council does not invalidate the teaching of papal infallibility because Honorius did not make an ex cathedra statement is historically absurd. ***This is to erect arbitrary conditions which were not existent at the time to save oneself the embarrassment of a historical fact which undermines one’s position. ***The issue is not what do individual Roman Catholic apologists say, but what did the Sixth Ecumenical Council say. On what basis did it condemn Pope Honorius? By its own words it condemned him in his official capacity as the bishop of Rome, not as a private theologian, for advancing heretical teachings which it says were Satanically inspired and would affect the entire Church. It specifically states that Honorius advanced these teachings, approved of them, and in a positive sense was responsible for disseminating them. And it condemns him by name as a heretic, anathematizing him as such. According to both Roman Catholic and Orthodox theology an Ecumenical Council is infallible so all the arguments which attempt to dismiss the judgment of this Council saying that it was mistaken or that it rushed to judgment or whatever, are simply erroneous and empty, on the basis of their own theology.
What I see is a private letter written to a individual that only comes into question. Papal Infallibilty has certain criteria to be met. In order for an infallible statement to be made one of the criteria for infallibility is it must be binding on all Christians to uphold and believe. This only comes from the Pope making an official declaration to all the faithful. Now as for Honorius, his private letter is brought up by heretics at the Council. What is the Council to do other than condemn Honorius as a heretic, not because he taught it publicly, but because he believed it materially. The reason for the Council to do this is because people in the Church are using Pope Honorius’ writings as evidence for their beliefs, thus the use of the word “disseminating,” because his personal thoughts were spreading through heretics as a defense for their beliefs. Where do you see Honorius making a public declaration of this heresy? Nowhere!