Paul devotes Romans 9-11 to the matter of Israel (the Israelites, the twelve tribes).
1. Here is how he starts: For I could wish that myself were accursed from Christ for my brethren, my kinsmen according to the flesh: Who are Israelites; to whom pertaineth the adoption, and the glory, and the covenants, and the giving of the law, and the service of God, and the promises; Whose are the fathers [THE PATRIARCHS, ABRAHAM, ISAAC, AND JACOB] , and of whom as concerning the flesh Christ came, who is over all, God blessed for ever. Amen. (9:3-5)
2. Then he quotes Isaiah about a believing remnant: Esaias also crieth concerning Israel, Though the number of the children of Israel be as the sand of the sea, a remnant shall be saved: For he will finish the work, and cut it short in righteousness: because a short work will the Lord make upon the earth. And as Esaias said before, Except the Lord of Sabaoth had left us a seed, we had been as Sodoma, and been made like unto Gomorrha. (9:27-29)
3. Then he quotes Isaiah regarding unbelieving Jews: But they have not all obeyed the gospel. For Esaias saith, Lord, who hath believed our report?... But Esaias is very bold, and saith, I was found of them that sought me not; I was made manifest unto them that asked not after me. But to Israel he saith, All day long I have stretched forth my hands unto a disobedient and gainsaying people. (10:16,20,21)
4. Then he shows that during the Church age, the *good olive tree* consists of believing Jews into which believing Gentiles are grafted as branches from the *wild olive tree*: Even so then at this present time also there is a remnant according to the election of grace...For if thou wert cut out of the olive tree which is wild by nature, and wert graffed contrary to nature into a good olive tree: how much more shall these, which be the natural branches, be graffed into their own olive tree?
(11:5,24).
Because of their unbelief, the majority of Jews have been made spiritually blind, while the Gentiles are being saved.
5. Then he confirms that a specific number of Gentiles will enter into the Church: For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the Gentiles be come in. (11:25) [This signifies the end of the church age]