And shall not uncircumcision which is by nature, if it fulfills the law, judge you, who by the letter and circumcision do transgress the law?
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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. Commentary on Paul’s Epistles.
Here Paul clearly recognizes that there are two types of uncircumcision—one by nature and the other by will. Here he speaks of the physical uncircumcision and goes on to say that if it keeps the law it will judge the circumcision which breaks it…. For this kind of uncircumcision is offended when the law is broken and comes to its defense…. It is not the law which is dishonored but the one who disgraces the law.