ForeverAdam;3435630:
Papal infallibility as defined by Vatican I only gave the Pope the power to create dogmas (and thus be infallible when he does so). However, we have no Pope ever claiming the ability to make dogmas before the 19th century and your own Church admits that this power wasn’t used until 1854, suspiciously close to when such an “immemorial teaching” was dogmatized.
Pope Leo pronounced in his Tome the doctrine that Christ was fully God and fully man,two natures in one person,even before his Tome was approved by the Council of Chalcedon. He did not have to wait for the approval of the Eastern bishops to pronounce this doctrine.
Flavian, patriarch of Constantinople, (d. AD 449), writing to Pope Leo I:
“The whole question [of Eutychianism] needs only your single decision and all will be settled in peace and quietness. Your sacred letter will with God’s help completely suppress the heresy… and so the convening of a council which is any case difficult will be rendered superfluous.”
St. Fulgentius of Ruspe (A.D. 465-533):
“That which the Roman Church, which has the loftiest place on the earth, teaches and holds, so does the whole Christian world believe without hesitation for their justification, and does not delay to confess for their salvation.”
It’s looks more like a new teaching to me. It certainly carries the appearance of innovation since it was unknown to the ancient Church (and still is to the Holy Orthodox Church).
Besides, the Council did call Honorius a heretic and anathemized him. No Roman Catholic Council would ever dream of doing such a thing to one of their Popes. In fact, such a thing would be impossible since according to Latin teaching, the ecumenical council depends on the agreement of the Pope.
That was true with the pre-Schism councils as well.
The Byzantine-Slavonic Menaion, January 2:
“Father Sylvester…thou didst appear as a pillar of fire, snatching the faithful from the Egyptian error [the Arian heresy] and continually leading them with unerring teachings to divine light. … Thou hast shown thyself the supreme one of the Sacred Council, O initiator into the sacred mysteries, and hast illustrated the Throne of the Supreme One of the Disciples. … Endowed with the See of the leader of the apostles, you became an outstanding minister of God, enriching, establishing, and increasing the church with divine dogmas. You were the prince of the sacred council and you adorned the throne of the head of the disciples; like a divine prince over the holy Fathers you confirmed the most sacred dogma.”
Theodore the Studite:
“Let him (Patriarch Nicephorus of Constantinople) assemble a synod of those with whom he has been at variance, if it is impossible that representatives of the other Patriarchs should be present, a thing which might certainly be if the Emperor should wish the Western Patriarch (the Roman Pope) to be present, to whom is given authority over an ecumenical synod; but let him make peace and union by sending his synodical letters to the prelate of the First See.” (Patr. Graec. 99, 1420)
St. Maximus:
“…the clergy and Church of the Romans, which from old until now presides over all the churches which are under the sun? Having surely received this canonically, as well as from councils and the apostles, as from the princes of the latter (Peter & Paul), and being numbered in their company, she is subject to no writings or issues in synodical documents, on account of the eminence of her pontificate …even as in all these things all are equally subject to her (the Church of Rome) according to sacerodotal law. And so when, without fear, but with all holy and becoming confidence, those ministers (the popes) are of the truly firm and immovable rock, that is of the most great and Apostolic Church of Rome.” (Maximus, in J.B. Mansi, ed. Amplissima Collectio Conciliorum, vol. 10)