There is one way that you can always win with the Orthodox when it comes to St. Gregory the Great. Simply list Gregory’s actions and then ask if they (the Orthodox) believe that about the bishop of Rome. Here are some examples:
1)Now eight years ago, in the time of my predecessor of holy memory Pelagius, our brother and fellow-bishop John in the city of Constantinople, seeking occasion from another cause, held a synod in which he attempted to call himself Universal Bishop. Which as soon as my said predecessor knew,
he despatched letters annulling by the authority of the holy apostle Peter the acts of the said synod; of which letters I have taken care to send copies to your Holiness.
newadvent.org/fathers/360205043.htm
Any Orthodox here who agree that Pope Pelagius had the authority to annul a synod held by the then Patriarch of Constantinople? Any Orthodox that believe the bishop of Rome ever had the authority to annul a local council held by another Patriarch?
2)Of the privileges of Monasteries.
We therefore
interdict in the name of our Lord Jesus Christ, and forbid by the authority of the blessed Peter, Prince of the apostles, in whose stead we preside over this Roman Church, that any bishop or secular person hereafter presume in any way to devise occasions of interfering with regard to the revenues, property, or writings of monasteries, or of the cells or vills thereto appertaining, or have recourse to any tricks or exactions: but, if any case should by chance arise as to land disputed between their churches and any monasteries, and it cannot be arranged amicably, let it be terminated without intentional delay before selected abbots and other fathers who fear God, sworn upon the most holy Gospels.
Any Orthodox here who believe Pope Gregory had the authority to forbid any bishop from interfering with the property of monasteries? Do you believe that the bishop of Rome ever held that authority?
Since the Orthodox disagree that the bishop of Rome ever had the type of authority that Gregory explicitly approved and exercised, it appears a little bit silly to quibble over his dislike of the term “universal bishop” used by John of Constantinople.