²⁵ Lest you be wise in your own sight, I do not want you to be unaware of this mystery, brothers: a partial hardening has come upon Israel, until the fullness of the Gentiles has come in. ²⁶ And in this way all Israel will be saved, as it is written,

Paul has been establishing the fact that God is not yet done with Israel. While the majority of Jews have rejected Jesus as their Messiah, a remnant has been shown mercy by God and placed their faith in His Son as their Savior. Paul was living proof of that reality, and there were other believing Jews in the church in Rome.

The Gentile believers had much for which to be grateful to the Hebrew nation. It was through the Jews that their Savior had come. Jesus was a descendant of Abraham and born into the line of King David, all in keeping with the promises made to both men. And while those Jews who refused to accept Jesus as their Savior were “broken off because of their unbelief” (Romans 11:20 ESV) and the Gentiles were grafted in, that did not mean that God had turned His back on His chosen people. If He was able to mercifully take Gentiles and graciously graft them into the root of Abraham, could He not do so with the Jews? Paul poses that very question.

And even they [the Jews], if they do not continue in their unbelief, will be grafted in, for God has the power to graft them in again. – Romans 11:23 ESV

The important word here is “belief.” Faith in Christ is required for anyone, whether Jew or Gentile, to be grafted into the root of Abraham. Paul wrote the Gentile believers in Galatia, reminding them of their status as children of Abraham because of their faith in Jesus, the descendant of Abraham.

The real children of Abraham, then, are those who put their faith in God. What’s more, the Scriptures looked forward to this time when God would declare the Gentiles to be righteous because of their faith. God proclaimed this good news to Abraham long ago when he said, “All nations will be blessed through you.” So all who put their faith in Christ share the same blessing Abraham received because of his faith. – Galatians 3:7-9 NLT

He went on to clarify, “Through Christ Jesus, God has blessed the Gentiles with the same blessing he promised to Abraham, so that we who are believers might receive the promised Holy Spirit through faith” (Galatians 3:14 NLT).

It is through faith, our belief in the saving power of Jesus Christ, that we inherit the promises made to Abraham. We become part of God’s family through belief in His Son, and the same thing is true for God’s chosen people, the Jews. But Paul indicates that a “partial hardening has come upon Israel” (Romans 11:25 ESV). The term Paul used is interesting. It is pōrōsis, and it means “obtrusiveness of mental discernment, dulled perception” (Outline of Biblical Usage). The root word means “to grow hard, callous, become dull, lose the power of understanding.”

For the time being, the Jews, individually and collectively, are experiencing a callousness to the gospel message, but this was all part of God’s divine plan. As Paul wrote earlier, “their rejection means the reconciliation of the world” (Romans 11:15 ESV). It was their rejection of Christ that led to the gospel being taken to the rest of the nations of the world. But Paul indicates that there will be a point when “the fullness of the Gentiles has come in” (Romans 11:25 ESV). Thomas L. Constable explains what this phrase means:

“When all the Gentiles whom God has chosen for salvation during the present age of Jewish rejection (setting aside) have experienced salvation, God will precipitate a revival of faith among the Jews. Even though some Jews trust Christ now, God is not presently working through them as Israel as He will in the future (i.e., in the Millennium), after multitudes of them turn to faith in Christ. He is now working through the church.” – Dr. Thomas L. Constable, Notes on Romans, 2009 Edition.

Paul writes, “The Deliverer will come from Zion, he will banish ungodliness from Jacob and this will be my covenant with them when I take away their sins” (Romans 11:26-27 ESV). He is quoting the writings of the prophet Isaiah.

“And a Redeemer will come to Zion,
    to those in Jacob who turn from transgression,” declares the Lord.” – Isaiah 59:20 ESV

Paul understood this passage as a prophecy concerning the Messiah, which was partially fulfilled in the coming of Jesus. But upon His arrival, Jesus was met with opposition from His own people. The apostle John described the less-than-warm welcome Jesus received from His fellow Jews.

He came into the very world he created, but the world didn’t recognize him. He came to his own people, and even they rejected him. But to all who believed him and accepted him, he gave the right to become children of God. – John 1:10-12 NLT

The Jews didn’t exactly roll out the red carpet when Jesus appeared the first time. But God is far from done with them. He will still accomplish His will among the Jewish people and fulfill the promises He made to them, but it will not take place until He has completed His work among the Gentiles. There is a day coming when the number of Gentiles to be saved will be complete. Paul is not inferring that ALL Gentiles will be saved; he is indicating that there is a limited number of those who will place their faith in Christ, and when that number has been reached, God’s work among the Gentiles will have been fulfilled. He will then turn His attention to the Jews.

But when Paul says that “all Israel will be saved,” he does not mean that every single Israelite who has ever lived will become a believer in Jesus Christ. In the same way that not all Gentiles will come to saving knowledge of Jesus Christ, neither will all Jews. But when compared to the relatively small believing remnant of Jews that currently exists, the number that will come to faith in the future will be large, and there will be representatives from every tribe of Israel.

The prophet Zechariah predicted a future day when God would do a mighty work among the people of Israel. He quotes God’s promise to complete His divine plan for His chosen people.

“I will pour out a spirit of grace and prayer on the family of David and on the people of Jerusalem. They will look on me whom they have pierced and mourn for him as for an only son. They will grieve bitterly for him as for a firstborn son who has died.” – Zechariah 12:10 NLT

The day will come when the people of Israel will grieve over their mistreatment and rejection of their Messiah. But their sorrow will be turned to joy. 

“On that day a fountain will be opened for the dynasty of David and for the people of Jerusalem, a fountain to cleanse them from all their sins and impurity.

“And on that day,” says the Lord of Heaven’s Armies, “I will erase idol worship throughout the land, so that even the names of the idols will be forgotten. I will remove from the land both the false prophets and the spirit of impurity that came with them.” – Zechariah 13:1-2 NLT

But not all Israel will be saved. The prophecy is very specific in indicating that God will redeem and restore a remnant of His chosen people.

“Two-thirds of the people in the land
    will be cut off and die,” says the Lord.
    “But one-third will be left in the land.
I will bring that group through the fire
    and make them pure.
I will refine them like silver
    and purify them like gold.
They will call on my name,
    and I will answer them.
I will say, ‘These are my people,’
    and they will say, ‘The Lord is our God.’” – Zechariah 13:8-9 NLT

God is ready, willing, and able to redeem Israel. He is not yet done with His chosen people, nor has He fully rejected them. He is simply waiting until the full number of Gentiles has come to faith in Christ, then He will turn His attention to the Jews. His plan is perfect, and His timeline is right on schedule. We don’t know when these things will take place, but we are to trust that they will, because our God is faithful, just, righteous, powerful, and fully capable of completing what He has started and fulfilling all that He has promised to the people of Israel and to us.