13 But what is your motive? Is it because a public building of whatever kind has been burnt, or because it was a synagogue? If you are moved by the burning of a building of no importance (for what could there be in so mean a town?), do you not remember, O Emperor, how many prefects' houses have been burnt at Rome, and no one inflicted punishment for it? And, in truth, if any emperor had desired to punish the deed sharply, he would have injured the cause of him who had suffered so great a loss.
Which, then, is more fitting, that a fire in some part of the buildings of Callinicum, or of the city of Rome, should be punished, if indeed it were right at all? At Constantinople lately, the house of the bishop was burnt and your Clemency's son interceded with his father, praying that you would not avenge the insult offered to him, that is, to the son of the emperor, and the burning of the episcopal house. Do you not consider, O Emperor, that if you were to order this deed to be punished, he would again intervene against the punishment?
That favour was, however, fittingly obtained by the son from the father, for it was worthy of him first to forgive the injury done to himself. That was a good division in the distribution of favour, that the son should be entreated for his own loss, the father for that of the son. Here there is nothing for you to keep back for your son. Take heed, then, lest you derogate anything from God.
Source: Letters (New Advent)