These things, most sweet and excellent daughter, I have briefly said, lest, as often as you hear of foolish men speaking in derogation of you, you should be touched by even the least sadness of heart. But, seeing that this very murmuring of foolish men cannot be allayed by quiet reason, I hold it to be sin if the doing of what can be done is neglected. For, when we appease insane minds, and bring them back to a healthy state, we ought by no means to cause them offense. For there are some offenses that are to be altogether despised; but there are some which, when they can be avoided without guilt, are not to be despised, lest there be guilt in keeping them alive. We learn this from the preaching of the sacred Gospel; since, when the Truth said, Not that which goes into the mouth defiles a man; but that which comes out of the mouth, this defiles a man, and the disciples replied saying, Do you know that the Pharisees were offended after they heard this saying? (Ibid. 12), straightway He replied, Every plant which my heavenly Father has not planted shall be rooted up. Let them alone; they be blind, and leaders of the blind (Ibid. 13). And yet, when tribute was demanded, He first gave a reason why tribute should not be paid, and immediately subjoined, Notwithstanding, lest we should offend them, go to the sea, and cast an hook, and take up the fish that first comes up; and when you have opened his mouth, you shall find a stater. That take, and give unto them for me and for you. Why is it that of some who were offended it is said, Let them alone; they are blind, and leaders of the blind; and that to others, lest they should be offended, tribute is paid by the Lord, even though not due? Why is it that He allowed one offense to remain, but forbade another to be caused to others? Why, but that He might teach us on the one hand to despise offenses which implicate us in sin, but on the other to mitigate in all ways those which we can appease without sin?
Wherefore your Excellency, God protecting you, may, with great quietness, turn aside the offenses of bad men. For the chief of them you should of your own accord call to you privately and give them reasons, and anathematize certain wrong points which they suppose to be held by you. And if too, as it is said may be the case, they suspect such anathema to be insincere, you should confirm it even by an oath, averring that you do not hold, and never have held, those points. Nor let it seem beneath you to satisfy them in such a way; nor let there be in your mind any feeling of disdain against them on account of your imperial race. For we are all brethren created by the power of one Emperor, and redeemed by His blood. And so we ought not in anything to despise our brethren, however poor and abject.
For certainly Peter had received power in the heavenly kingdom, so that whatever he should bind or loose on earth should be bound or loosed in heaven; he walked on the sea, he healed the sick with his shadow, he slew sinners with his word, he raised the dead by his prayer And because by the admonition of the Spirit he had gone in to Cornelius the Gentile, a question was raised against him by the believers as to why he had gone in among Gentiles and eaten with them, and why he had received them in baptism. And yet this first of the apostles, filled with such gifts of grace, supported by such power of miracles, replied to the complaint of the believers, not by power but by reason, and explained the case to them in order; how he saw a certain vessel, as it had been a sheet, in which were four-footed beasts of the earth, and wild beasts, and creeping things, and fowls of the air, let down from heaven, and heard a voice saying, Arise, Peter; kill and eat; how three men came to him calling him to Cornelius; how the Holy Spirit bade him go with them; how the same Holy Spirit who had been wont to come on those baptized in Judea after baptism, came on the Gentiles before baptism. For if, when he was blamed by the believers, he had paid regard to the authority which he had received in Holy Church, he might have replied that the sheep should not dare to find fault with the shepherd to whom they had been committed. But, had he said anything of his own power in answer to the complaint of the believers, he would not have been truly a teacher of gentleness. He pacified them, therefore, by giving a reason humbly, and even produced witnesses to defend him from blame, saying, Moreover these six brethren accompanied me. If, then, the pastor of the Church, the Prince of the Apostles, who singularly did signs and miracles, disdained not, in defending himself from blame, humbly to give a reason, how much more ought we sinners, when we are blamed for anything, to pacify those who blame us by giving a reason humbly!
Source: Register of Letters (New Advent)