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?
All Commentaries on Romans 2:27 Go To Romans 2
Ambrosiaster
AD 400
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.