Dearest Brethren

Letter 1,75 - to all the bishops of Numidia. August 591.

"You requested from our predecessor of blessed memory that all the customs of previous times should be preserved for you, which he preserved over a long past, from the very first regulations of Saint Peter, the prince of the apostles, right up to now.
And we indeed, in accordance with the sequence of your review, allow any custom to remain unchanged, provided however that it is known to employ nothing contrary to the Catholic faith, whether about the election of primates and the other chapters, except for those which affect the episcopate from the Donatists, whom we prohibit in every way from being promoted to the rank of primate, even though their clergy might raise them to this position.
Rather let it suffice for them just to take care of the common people entrusted to them, but not even to go before those bishops whom the Catholic faith has taught in the bosom of the Church, and has brought forth for the culmination, which is becoming a primate.
You therefore, dearest brethren, anticipate our admonitions with the zeal of your love for the Lord, knowing that a very strict judge is going to be brought down to examine all we are doing, and he will approve of each one of us not for the privilege of a more sublime rank, but for the merits of our deeds."

Cited from: The Letters of Gregory the Great, trans. John R.C. Martyn (Toronto: PIMS, 2004), I: 188.