So, you would say that your "orthodox exegesis" of Matthew 16:18 establishes incontrovertibly that the Bishop of Rome is, in fact, the Sole Infallible Vicar of Christ on Earth?
Have you, perhaps, checked with the Eastern Orthodox regarding your allegedly "orthodox" exigesis? Do they agree with the Papist glosses with which you have subverted these Scriptures since your "Pope" schismatically broke with them in 1054 AD? "You would do well to remember that the Greeks are one half of the Body of Christ; indeed, I daresay that they are the Better Half!"
That being said, it's rather difficult for me to accept as instructive any Romanist Quotation-Dump which is riddled with Origen citations. Origen's writings supporting the Pre-Existence of Souls, "metempsychosis" or Reincarnation, and his botched conception of the Trinity, utterly disqualify him in my book as being an "authoritative" Christian Teacher. At best, it is my hope and belief that he died with a basically-correct understanding of the core Gospel itself; but beyond that (at least, overall), his Heretical Teachings have served far too many Cultists and Heretics to be regarded as "Good Fruit" by any Apostolic-, Nicene-, Athanasian-Creedal Christian. Why don't you just go the extra mile, and cite some Mormons, fer cryin' out loud?
Best, OP
NOTE #145: The "Better Half" quotation is derived from Saint Luther of Wittenberg (attested but apocryphal).