Rom 2:27

“And that the Lord did not abrogate the natural [precepts] of the law, by which man is justified, which also those who were justified by faith, and who pleased God, did observe previous to the giving of the law, but that He extended and fulfilled them, is shown from His words. "For," He remarks, "it has been said to them of old time, Do not commit adultery. But I say unto you, That every one who hath looked upon a woman to lust after her, hath committed adultery with her already in his heart." And again: "It has been said, Thou shalt not kill. But I say unto you, Every one who is angry with his brother without a cause, shall be in danger of the judgment." And, "It hath been said, Thou shalt not forswear thyself. But I say unto you, Swear not at all; but let your conversation be, Yea, yea, and Nay, nay." And other statements of a like nature. For all these do not contain or imply an opposition to and an overturning of the [precepts] of the past, as Marcion's followers do strenuously maintain; but [they exhibit] a fulfilling and an extension of them, as He does Himself declare: "Unless your righteousness shall exceed that of the scribes and Pharisees, ye shall not enter into the kingdom of heaven." For what meant the excess referred to? In the first place, [we must] believe not only in the Father, but also in His Son now revealed; for He it is who leads man into fellowship and unity with God. In the next place, [we must] not only say, but we must do; for they said, but did not. And [we must] not only abstain from evil deeds, but even from the desires after them. Now He did not teach us these things as being opposed to the law, but as fulfilling the law, and implanting in us the varied righteousness of the law. That would have been contrary to the law, if He had commanded His disciples to do anything which the law had prohibited. But this which He did command-namely, not only to abstain from things forbidden by the law, but even from longing after them-is not contrary to [the law], as I have remarked, neither is it the utterance of one destroying the law, but of one fulfilling, extending, and affording greater scope to it.”

“The Jew according to the flesh may keep the law, but only the man who is spiritual, who is a Jew in secret, can fulfill it. Insofar as the former is a transgressor of the law, it is the latter who will be his judge.”

“"And shall not the uncircumcision which is by nature judge?" You see, he recognizes two uncircumcisions, one from nature, and the other from the will. Here, however, he speaks of that from nature, but does not pause here, but goes on, "if it fulfil the Law, judge thee, who by the letter and circumcision dost transgress the Law?" See his exquisite judgment. He does not say, that the uncircumcision which is from nature shall judge the circumcision, but while where the victory had been, he brings in the uncircumcision, yet where the defeat is, he does not expose the circumcision as defeated; but the Jew himself who had it, and so by the wording spares offending his hearer. And he does not say, "thee that hast the Law and the circumcision," but yet more mildly, "thee who by the letter and circumcision dost transgress the Law." That is, such uncircumcision even stands up for the circumcision, for it has been wronged and comes to the Law's assistance, for it has been insulted, and obtains a notable triumph. For then is the victory decided, when it is not by Jew that Jew is judged, but by the uncircumcised; as when he says, "The men of Nineveh shall rise in judgment against this generation, and shall condemn it." (Matt. xii. 41.)”

“This either means that as long as the Jews continue their literal circumcision they reject the spiritual circumcision, or that they will be judged because they have not followed what the law said, viz., that by believing in Christ they might receive the true circumcision.”

“Here he clearly shows that he means two uncircumcisions, one natural and the other voluntary, which occurs, as was said, when someone in no way cuts off the carnal passions, and two circumcisions, one according to the flesh and the other a circumcision of the heart in the spirit. "The uncircumcised," he says, "by nature," having the circumcision of the passions through the fulfillment of "the law," that is, as was said above, the ordinances of the law, "will judge," that is, will condemn, not circumcision (for to speak thus of it would be harsh), but "you," who are outwardly indeed circumcised in the flesh, but uncircumcised in heart, as a transgressor of the ordinances of the law.”

“Second, at and will not that which by nature, he shows that on account of observing the law the gentile is preferred to the Jew. Hence he says, will not that which by nature is uncircumcision, i.e., an uncircumcised gentile, if it fulfill the law through natural reason, judge you, the circumcised Jew, who by the letter is a transgressor of the law, by transgressing the precepts of the law, and have circumcision, i.e., of the flesh. Hence on the basis of this comparison it is written: the men of Nineveh will arise with this generation (Matt 12:4).”

“The Gentile who believes under the guidance of nature condemns the Jew, to whom Christ was promised through the law and who refused to believe in him when he came. For as much as the Gentile is being prepared for glory for having known the Creator of nature by nature alone, so the Jew deserves to be punished all the more because he did not know Christ the Creator, either by nature or by the law.”