4 the people of Israel. Theirs is the adoption to sonship; theirs the divine glory, the covenants, the receiving of the law, the temple worship and the promises.
5 Theirs are the patriarchs, and from them is traced the human ancestry of the Messiah, who is God over all, forever praised!a Amen.

God’s Sovereign Choice

6 It is not as though God’s word had failed. For not all who are descended from Israel are Israel.
7 Nor because they are his descendants are they all Abraham’s children. On the contrary, “It is through Isaac that your offspring will be reckoned.”b
8 In other words, it is not the children by physical descent who are God’s children, but it is the children of the promise who are regarded as Abraham’s offspring.