Nicene and Post-Nicene Fathers, Ser. II, Vol. XII: The Bo...
Gregory to Donus, Bishop of Messana (Messene).
Moved by the benevolence of the Apostolic See, and by the order of ancient custom, we have thought fit to grant to thee, who art known to have undertaken the office of government in the Church of Messana, the use of the pallium; to wit, at such times and in such manner as we dispute not that thy predecessor used it; at the same time warning thee that, as thou rejoicest in having received from us a decoration of this kind to the honour of thy priestly office, so also thou strive, by probity of manners and deeds, to adorn, to the glory of Christ, the office which thou hast undertaken under our authority. For so wilt thou be conspicuous for decorations mutually answering to each other, if with such an habiliment of the body as this all good qualities of thy soul also agree. For all the privileges which are known to have been granted of old to thy Church we confirm by our authority, and decree that they shall continue inviolate.