In the first eleven chapters of Romans, Paul catalogs the mercies of God in God’s provision of righteousness through the gospel. First, in
Romans 1:1—3:20 Paul considers the universal human need for God’s righteousness, as all are unrighteous and separated from God. Then in
Romans 3:21—4:25 Paul lays out how God applied righteousness through faith to all who believe in Jesus, outlining three different and significant types of
descendants of Abraham: 1) ethnic Israel (
Romans 4:1), 2) believing Gentiles (
Romans 4:11), and 3) believing Jews (
Romans 4:12). These three sets of descendants of Abraham are especially important for understanding the partial hardening and the fullness of the Gentiles that Paul talks about in
Romans 11.
I was in agreement until you say the righteousness of God through faith was ever promised to ethnic Israel. The promise of righteousness of God through faith is only for those of ethnic Israel of faith. That's why Paul writes the hardness to them is only in part, because those of faith are not in hardness and unbelief as are those are. Paul NEVER says the partial hardening in part of ethnic Israel shall be lifted when the fullness of Gentiles is complete. Paul says only that Israel of faith shall be complete by the fullness of Gentiles grafted into the good olive tree (Christ), and that is how "all Israel" of faith shall be saved. It is in this manner, or this is how the spiritual Kingdom of God shall be completed,, through the Gentiles of faith being grafted into the Kingdom of God with Jews of faith for they are the "Israel of God."
While discussing these mercies of God, Paul seems to anticipate that his readers might wonder why, if God is so faithful to restore those who believe in Jesus, God’s promises of restoration to Israel do not seem to be fulfilled yet. Simply put, if
God is faithful, and if His promises to believers are trustworthy, then why is He not keeping His promises to Israel? It is to answer this concern that Paul writes
Romans 9—11, as he introduces the ideas of a partial hardening of Israel and the fullness of the Gentiles (
Romans 11:25).
God has never promised eternal life to anyone who is not of faith! The only part of ethnic Israel promised God's mercy are those of faith! God has not promised to restore the ethnic nation called Israel. Paul does not say they would be restored in this age or the one to come.
While there are believing Jews and Gentiles, Paul explains that the nation of Israel as a whole has not yet received her Messiah (
Romans 10:18—11:10), but they will one day be saved through believing in their Messiah (
Romans 11:26).
Nowhere does Paul say that ethnic Israel now and past in unbelief shall one day be saved by believing in their Messiah! If mankind is not saved by grace through faith before the sounding of the seventh trumpet, whosoever is still in unbelief then, will be utterly destroyed by the fire of God that shall come down from heaven. They will not be another opportunity for Israel in unbelief or anyone else still in unbelief to be saved when time given this earth is finished, and Christ returns for His people.
In the meantime, Paul explains that there is a partial hardening of the nation—that many will refuse the Messiah—until the fullness of the Gentiles occurs. Israel’s hardening will continue until the divinely set number of Gentiles are saved: “Some of the people of Israel have hard hearts, but this will last only until the full number of Gentiles comes to Christ” (
Romans 11:25, NLT).
Where in this verse does Paul say the partial hardening of ethnic Israel shall be removed? He does not say this! Paul writes only that "all Israel" that shall be saved is when the fullness of Gentiles has come in with them. IOW when the spiritual Kingdom of God in heaven that is now being built as the Gospel is proclaimed unto all the nations of the world in the power of the Holy Spirit is complete, then "all Israel shall be saved", NOT an ethnic people but ALL people of faith.
Romans 11:25-26 (KJV) 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. And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob:
Paul has already said it was his desire that SOME of his ethnic seed might be saved. It was through the diminishing of Israel in unbelief that brought riches (salvation) to the Gentiles that might bring fullness to his countrymen of faith. How? By preaching salvation through Christ to Gentiles and some of them too being saved, Paul's biological seeds would be provoked to emulate the Gentiles of faith as they too now proclaim Christ unto Jews in unbelief. Through the Gospel proclaimed by Gentiles of faith to unbelieving Jews, which is where the proclamation of the Gospel began, through Gentiles of faith, SOME, not ALL of ethnic Israel in unbelief might turn from unbelief to believing in Christ for eternal life.
Romans 11:12-14 (KJV) Now if the fall of them
be the riches of the world, and the diminishing of them the riches of the Gentiles; how much more their fulness? For I speak to you Gentiles, inasmuch as I am the apostle of the Gentiles, I magnify mine office: If by any means I may provoke to emulation
them which are my flesh, and might save some of them.
Even though God’s promises to save the nation of Israel are not presently being fulfilled, Paul recognizes that God will keep those promises after the fullness of the Gentiles. Paul seems to be building on the foundation of
Daniel 9, in which is revealed a 490-year prophetic timeline after which God will accomplish His covenant blessings for Israel. After the first 483 years of the timeline, the Messiah was cut off (
Daniel 9:26a), signaling a shift in the focus away from Israel as Gentiles (Rome) would dominate, and there would be wars and desolation. But one day in the future, the ruler who would be known as
the Antichrist would make a seven-year agreement with Israel. That last seven years of the timeline would begin to return the focus back to Israel and would conclude the times of the Gentiles of which Jesus spoke in
Luke 21:24.
The prophecy of Daniel was fulfilled when Christ came. There is no mention of a seven year agreement with Israel and some Antichrist, nor is there a last seven years to begin.
One day, the fullness of the Gentiles will be complete, and God will deliver the nation of Israel. Anyone who might have doubts about God’s faithfulness in keeping His promises can consider these passages as important reminders that God has a detailed plan that He is fulfilling patiently and carefully.
When the fullness of the Gentiles is complete, the spiritual Kingdom of God in heaven shall be complete and the seventh and final trumpet shall sound and time given this earth shall be no longer. Today is the time for be saved. If mankind from any nation is not saved before time given this earth expires, there is no more hope for them. Now, since the advent of Christ coming to earth a man, is the time for salvation.
Revelation 10:5-7 (KJV) And the angel which I saw stand upon the sea and upon the earth lifted up his hand to heaven, And sware by him that liveth for ever and ever, who created heaven, and the things that therein are, and the earth, and the things that therein are, and the sea, and the things which are therein, that there should be time no longer: But in the days of the voice of the seventh angel, when he shall begin to sound, the mystery of God should be finished, as he hath declared to his servants the prophets.