What does the Bible say about the true Israel?

The Apostle Paul asserts in Romans 9:6-8 that not all who are physically descended from Israel are truly part of God's chosen people. True Israel consists of those who have received spiritual circumcision—indicative of genuine faith in Christ. This theme is reinforced throughout Romans, where Paul explains that being part of Israel is not based on physical lineage but on God's electing grace. The true Israel is comprised of those who are 'children of the promise,' united to Christ through faith and given the righteousness of God through Him.