16 You are wise, therefore, to insist, when pleading with us for your countrymen on the compassion of Christians, not on the stern doctrines of the Stoical philosophy, which in no wise help, but much rather hinder, the cause which you have undertaken to support. For a merciful disposition, which we must have if it be possible for us to be moved either by your intercession or by their entreaties, is pronounced by the Stoics to be an unworthy weakness, and they expel it utterly from the mind of the wise man, whose perfection, in their opinion, is to be as impassive and inflexible as iron. With more reason, therefore, might it have occurred to you to quote from your own Cicero that sentence in which, praising Cæsar, he says, “Of all your virtues, none is more worthy of admiration, none more graceful, than your clemency.” How much more ought this merciful disposition to prevail in the churches which follow Him who said, “I am the way,” and which learn from His word, “All the ways of the Lord are mercy and truth”! Fear not, then, that we will try to bring innocent persons to death, when in truth we do not even wish the guilty to experience the punishment which they deserve, being moved by that mercy which, joined with truth, we love in Christ. But the man who, from fear of painfully crossing the will of the guilty, spares and indulges vices which must thereby gather more strength, is less merciful than the man who, lest he should hear his little boy crying, will not take from him a dangerous knife, and is unmoved by fear of the wounds or death which he may have to bewail as the consequence of his weakness. Reserve, therefore, until the proper time the work of interceding with us for those men, in loving whom (excuse my saying so) you not only do not go beyond us, but are even hitherto refusing to follow our steps; and write rather in your reply what influences you to shun the way which we follow, and in which we beseech you to go along with us towards that fatherland above, in which we rejoice to know that you take great delight.
17. As to those who are by birth your fellow citizens, you have said indeed that some of them, though not all, were innocent; but, as you must see if you read over again my other letter, you have not made out a defence for them. When, in answer to your remark that you wished to leave your country flourishing, I said that we had felt thorns rather than found flowers in your countrymen, you thought that I wrote in jest. As if, forsooth, in the midst of evils of such magnitude we were in a mood for mirth. Certainly not. While the smoke was ascending from the ruins of our church consumed by fire, were we likely to joke on the subject? Although, indeed, none in your city appeared in my opinion innocent, but those who were absent, or were sufferers, or were destitute both of strength and of authority to prevent the tumult, I nevertheless distinguished in my reply those whose guilt was greater from those who were less to blame, and stated that there was a difference between the cases of those who were moved by fear of offending powerful enemies of the Church, and of those who desired these outrages to be committed; also between those who committed them and those who instigated others to their commission; resolving, however, not to institute inquiry in regard to the instigators, because these, perhaps, could not be ascertained without recourse to the use of tortures, from which we shrink with abhorrence, as utterly inconsistent with our aims. Your friends the Stoics, who hold that all faults are alike, must, however, if they were the judges, pronounce them all equally guilty; and if to this opinion they join that inflexible sternness wherewith they disparage clemency as a vice, their sentence would necessarily be, not that all should be pardoned alike, but that all should be punished alike. Dismiss, therefore, these philosophers altogether from the position of advocates in this case, and rather desire that we may act as Christians, so that, as we desire, we may gain in Christ those whom we forgive, and may not spare them by such indulgence as would be ruinous to themselves. May God, whose ways are mercy and truth, be pleased to enrich you with true felicity!
Source: Letters (New Advent)