He now comes to deal more particularly and expressly with the Jews, reciting their privileges, in which they trusted, and of which they boasted; and shows, that notwithstanding them, they stood in as much need of the righteousness of God as the Gentiles did.
Thou; he speaks in the singular number, that every one might make the readier application of what he said.
Art called a Jew; so called from Judah; as of old, Hebrews from Heber, and Israelites from Israel: the title was honourable in those days, and imported a confessor or worshipper of one God. Thou art so called, but art not so indeed: see Rom_2:28, and Rev_2:9.
Restest in the law; puttest thy trust in it.
Makest thy boast of God; that he is thy God, and in covenant with thee; and that thou hast a peculiar interest in him: see Joh_8:41. The phrase seems to be borrowed from Isa_45:25.