5 For the glorious honour of our predecessors, the blessed martyrs Cornelius and Lucius, must be maintained, whose memory as we hold in honour, much more ought you, dearest brother, to honour and cherish with your weight and authority, since you have become their vicar and successor. For they, full of the Spirit of God, and established in a glorious martyrdom, judged that peace should be granted to the lapsed, and that when penitence was undergone, the reward of peace and communion was not to be denied; and this they attested by their letters, and we all everywhere and entirely have judged the same thing. For there could not be among us a diverse feeling in whom there was one spirit; and therefore it is manifest that he does not hold the truth of the Holy Spirit with the rest, whom we observe to think differently. Intimate plainly to us who has been substituted at Arles in the place of Marcian, that we may know to whom to direct our brethren, and to whom we ought to write. I bid you, dearest brother, ever heartily farewell.
Source: The Epistles of Cyprian (New Advent)