What does the Bible say about spiritual Israel?

In the New Testament, Paul makes a distinction between natural Israel, comprising the physical descendants of Abraham, and spiritual Israel, which includes believers in Christ. As evident in Romans 9:6-8, not all who are descended from Israel are truly Israel; rather, it is the children of the promise who are counted as Abraham's offspring. This spiritual lineage emphasizes that true identity comes through faith, as highlighted in Galatians 3:26-29, where all believers are recognized as children of God and heirs according to the promise through faith in Christ.