The Christian Church is the True "Israel"
The Abrahamic promises find their fulfillment in Christ, the true Seed of Abraham, and all who are united to Christ by faith—Jew or Gentile—are Abraham’s seed and heirs according to the promise. Joshua shows that God truly fulfilled the earthly land promise to Israel, but the New Testament expands the inheritance beyond Canaan to the world, the heavenly city, and the final new creation. Paul teaches that true Israel is not defined by bloodline, outward circumcision, or national status, but by faith, inward circumcision of the heart, and union with Christ. Christ has made Jew and Gentile one new man, one body, one fold, one household, and one people of God; therefore, the old covenant shadows of temple, sacrifices, land, and ceremonial distinctions have reached their substance in Him. Thus, all the promises of God are “yea” and “Amen” in Christ, and the true heirs of Abraham are those who belong to Him by faith.