In the final state of God's kingdom, the great walls of the New Jerusalem are not for protection, but rather for distinction [Revelation 21:12-27]. The New Jerusalem will be the location where the throne of God and the Lamb dwells, and where His servants, the royal priesthood, serve and reign forever [1 Peter 2:9, Revelation 22:3-5]. The kings of the nations on the new earth will bring their riches and glory into the Holy City, paying homage to Him in perpetual worship [Revelation 21:24-26]. But by no means will any of those nations ever live in the New Jerusalem, for it is exclusively the home of God and His treasured possession, His very own inheritance [Revelation 21:27, Ephesians 1:18]. And with the Lamb they shall reign over the nations and all of creation as firstborn sons in Jesus Christ [Romans 8:17-29, Revelation 22:5].
Throughout the Bible, God makes a distinction between His covenantal people and the rest of the nations:
"For you are a holy people to the Lord your God; the Lord your God has chosen you to be a people for Himself, a special treasure above all the peoples on the face of the earth"
[Deuteronomy 7:6].
"You are a chosen generation, a royal priesthood, a holy nation, His own special people"
[1 Peter 2:9].
As Christians, we have been brought into the commonwealth of Israel [Romans 11:17-24; Ephesians 2:11-13, 19], and get to share in their divine calling of being the head of all nations [Deuteronomy 28:13]!
For their calling is irrevocable:
"Concerning the Gospel they are enemies for your sake (that is Israel), but concerning the election they are beloved for the sake of the fathers. For the gifts and the calling of God are irrevocable" [Romans 11:28-29].
Amazing stuff! 🙌
FYI: Our oneness with God's holy people of all generations might be a new concept for you. It is often ignored or misunderstood. So here is a layout of my Scriptural insights put together to help you understand how God's word communicates this reality:
1. The Commonwealth of Israel and the Shared Gathering
The argument from Ephesians 2 is one of the strongest defenses for the sainthood of Old Testament believers. Paul explicitly states that prior to Christ, Gentiles were "alienated from the commonwealth of Israel and strangers from the covenants of promise" (Ephesians 2:12).
The gospel did not create a brand-new commonwealth; rather, through the blood of Christ, Gentiles who were once far off "have been brought near" (Ephesians 2:13). By Christ's work of redemption, He made both groups one, meaning Gentile believers are no longer strangers but "fellow citizens with the saints and members of the household of God" (Ephesians 2:19). If Gentiles are fellow citizens with the saints by being brought into the commonwealth of Israel, then the original citizens of that godly commonwealth—the faithful of Israel—must be the saints. The gospel brought Gentiles into the existing, historic assembly of God's set-apart people.
2. Partaking in the Inheritance of the Saints
In Colossians 1, Paul gives thanks to the Father, "who has qualified us to share in the inheritance of the saints in light" (Colossians 1:12).
Throughout the Scriptures, the concept of a spiritual "inheritance" and a portion in the light belongs inherently to the elect nation of Israel. By using this specific language, the New Testament demonstrates that the ultimate package of promises given to Abraham, Isaac, and Jacob is the very inheritance New Covenant believers now share. Because every promise of God is "Yes" and "Amen" in Christ (2 Corinthians 1:20), New Covenant believers are full beneficiaries of the unfulfilled promises made to Israel. We are sharing their inheritance, which naturally means they are part of the identical body of saints.
3. One Collective Assembly
Finally, Hebrews 12 provides a clear picture of this unified reality. It describes the Heavenly Jerusalem as a single, festive gathering and one collective assembly—the ekklesia. It explicitly calls this the "assembly of the firstborn ones enrolled in heaven" (Hebrews 12:23), consisting of both Old and New Covenant believers centered around Jesus Christ. Since Israel was explicitly declared by God to be His firstborn son (Exodus 4:22), and Jesus is the ultimate Firstborn Son, all faithful believers from both eras are structurally joined into this single assembly of firstborn sons. Gentile believers were simply grafted into the existing olive tree to partake of the root and fatness of the promises (Romans 11:17).