“Behold, thou art called a Jew, and restest in the law, and makest thy boast of God,”
King James Version (KJV)
2:17 But if thou art called a Jew - This highest point of Jewish glorying, after a farther description of it interposed, #Rom 2:17 |- 20, and refuted, Rom 2:21 - 24, is itself refuted, #Rom 2:25|, &c. The description consists of twice five articles; of which the former five, #Rom 2:17|,18, show what he boasts of in himself; the other five, #Rom 2:19|,20, what he glories in with respect to others. The first particular of the former five answers to the first of the latter; the second, to the second, and so on. And restest in the law - Dependest on it, though it can only condemn thee. And gloriest in God - As thy God; and that, too, to the exclusion of others.
Ro 2:17 Behold, thou art called a Jew. Already, Paul has shown that all men, Jew or Gentile, will be judged according to their deeds, whether they have the law or not (Ro 2:1-16). Now he applies the argument directly to the Jew, in order to show his need of the gospel as well as the Gentile. Ro 2:17-20 state what the Jew claimed for himself. Called a Jew. To Paul the word "Jew" had a meaning much like "Christian" to us. It meant to him one of God's people. Rested upon the law. There is no article before "law" in the Greek. The Jew had law, in this case "the" law, for his foundation. Makest thy boast of God. Boasted of God's favor to his race.