20 It seems to me important to ascertain precisely what is that submission to the law which the apostle here condemns; for I do not think that he speaks here of circumcision merely, or of the sacrifices then offered by our fathers, but now not offered by Christians, and other observances of the same nature. I rather hold that he includes also that precept of the law, “You shall not covet,” which we confess that Christians are unquestionably bound to obey, and which we find most fully proclaimed by the light which the Gospel has shed upon it. “The law,” he says, “is holy, and the commandment holy, and just, and good;” and then adds, “Was, then, that which is good made death unto me? God forbid.” “But sin, that it might appear sin, wrought death in me by that which is good; that sin, by the commandment, might become exceeding sinful.” As he says here, “that sin by the commandment might become exceeding sinful,” so elsewhere, “The law entered that the offense might abound; but where sin abounded, grace did much more abound.” Again, in another place, after affirming, when speaking of the dispensation of grace, that grace alone justifies, he asks, “Wherefore then serves the law?” and answers immediately, “It was added because of transgressions, until the Seed should come to whom the promises were made.” The persons, therefore, whose submission to the law the apostle here pronounces to be the cause of their own condemnation, are those whom the law brings in guilty, as not fulfilling its requirements, and who, not understanding the efficacy of free grace, rely with self-satisfied presumption on their own strength to enable them to keep the law of God; for “love is the fulfilling of the law.” Now “the love of God is shed abroad in our hearts,” not by our own power, but “by the Holy Ghost, which is given unto us.” The satisfactory discussion of this, however, would require too long a digression, if not a separate volume. If, then, that precept of the law, “You shall not covet,” holds under it as guilty the man whose human weakness is not assisted by the grace of God, and instead of acquitting the sinner, condemns him as a transgressor, how much more was it impossible for those ordinances which were merely typical, circumcision and the rest, which were destined to be abolished when the revelation of grace became more widely known, to be the means of justifying any man! Nevertheless they were not on this ground to be immediately shunned with abhorrence, like the diabolical impieties of heathenism, from the first beginning of the revelation of the grace which had been by these shadows prefigured; but to be for a little while tolerated, especially among those who joined the Christian Church from that nation to whom these ordinances had been given. When, however, they had been, as it were, honourably buried, they were thenceforward to be finally abandoned by all Christians.
21. Now, as to the words which you use, “non dispensative, ut nostri voluere majores,” — “not in a way justifiable by expediency, the ground on which our fathers were disposed to explain the conduct of the apostles,”— pray what do these words mean? Surely nothing else than that which I call “officiosum mendacium,” the liberty granted by expediency being equivalent to a call of duty to utter a falsehood with pious intention. I at least can see no other explanation, unless, of course, the mere addition of the words “permitted by expediency” be enough to make a lie cease to be a lie; and if this be absurd, why do you not openly say that a lie spoken in the way of duty is to be defended? Perhaps the name offends you, because the word “officium” is not common in ecclesiastical books; but this did not deter our Ambrose from its use, for he has chosen the title “De Officiis” for some of his books that are full of useful rules. Do you mean to say, that whoever utters a lie from a sense of duty is to be blamed, and whoever does the same on the ground of expediency is to be approved? I beseech you, consider that the man who thinks this may lie whenever he thinks fit, because this involves the whole important question whether to say what is false be at any time the duty of a good man, especially of a Christian man, to whom it has been said, “Let your yea be yea, and your nay, nay, lest ye fall into condemnation,” and who believes the Psalmist's word, “You will destroy all them that speak lies.”
22. This, however, is, as I have said, another and a weighty question; I leave him who is of this opinion to judge for himself the circumstances in which he is at liberty to utter a lie: provided, however, that it be most assuredly believed and maintained that this way of lying is far removed from the authors who were employed to write holy writings, especially the canonical Scriptures; lest those who are the stewards of Christ, of whom it is said, “It is required in stewards, that a man be found faithful,” should seem to have proved their fidelity by learning as an important lesson to speak what is false when this is expedient for the truth's sake, although the word fidelity itself, in the Latin tongue, is said to signify originally a real correspondence between what is said and what is done. Now, where that which is spoken is actually done, there is assuredly no room for falsehood. Paul therefore, as a “faithful steward” doubtless is to be regarded as approving his fidelity in his writings; for he was a steward of truth, not of falsehood. Therefore he wrote the truth when he wrote that he had seen Peter walking not uprightly, according to the truth of the gospel, and that he had withstood him to the face because he was compelling the Gentiles to live as the Jews did. And Peter himself received, with the holy and loving humility which became him, the rebuke which Paul, in the interests of truth, and with the boldness of love, administered. Therein Peter left to those that came after him an example, that, if at any time they deviated from the right path, they should not think it beneath them to accept correction from those who were their juniors,— an example more rare, and requiring greater piety, than that which Paul's conduct on the same occasion left us, that those who are younger should have courage even to withstand their seniors if the defence of evangelical truth required it, yet in such a way as to preserve unbroken brotherly love. For while it is better for one to succeed in perfectly keeping the right path, it is a thing much more worthy of admiration and praise to receive admonition meekly, than to admonish a transgressor boldly. On that occasion, therefore, Paul was to be praised for upright courage, Peter was to be praised for holy humility; and so far as my judgment enables me to form an opinion, this ought rather to have been asserted in answer to the calumnies of Porphyry, than further occasion given to him for finding fault, by putting it in his power to bring against Christians this much more damaging accusation, that either in writing their letters or in complying with the ordinances of God they practised deceit.
Source: Letters (New Advent)