given you the sovereignty of temporal things, in like manner we have received from him, through St. Peter, Prince of the Apostles, the sovereignty of spiritual things. To us is committed the care of the flock; this care is as much more excellent as the heavens are above the earth. Hear what the Lord said to Peter, Thou art Peter, etc. I therefore entreat your Piety to honour the name and dignity of the Prince of the Apostles by conforming to his decrees; for the episcopate in all the churches on earth owes its origin to St. Peter, by whom we instruct all the faithful, teaching them wholesome and incorruptible doctrine."
Here is a clear enunciation of Papal sovereignty and Papal infallibility of divine right. Stephen pretends that the legates of Pope Sylvester, at the first Council of Nicea, established this principle, "That the first bishop could not be judged by any one." Such an assertion was worthy of the erudition of that age. As a consequence of his doctrine of the episcopal character, Stephen claims that Photius never was any thing but a layman, since he did not derive his episcopate from Rome.
"Did not the Roman Church," he adds, "write to you to hold a council at Constantinople? I ask you, to whom could it write? To Photius, a layman? If you had a Patriarch, our Church would often visit him by letters. But, alas! the glorious city of Constantinople is without a pastor, and if the affection that we bear toward you did not lead us to bear patiently the insult to our Church, we should be obliged to pronounce against the prevaricator, Photius, who has so basely spoken against us, more severe penalties than our predecessors. We do not presume, in thus speaking, to fail in the respect due to you; we speak in our own defence and that of Pope Marin, who held the same sentiments as Pope Nicholas."
