What does the Bible say about the children of the promise?

The concept of the 'children of the promise' is rooted in Romans 9:6-8, which explains that not all who are descended from Israel belong to Israel. The true children are those designated by God’s promise, as seen in the case of Abraham's son Isaac. This distinction illustrates God's sovereignty in salvation, highlighting His choice to save a remnant among humanity, demonstrating that it is not merely lineage or human effort that determines one’s status before God, but divine election and grace. Hence, those who are children of the flesh do not receive the same inheritance as the children of promise, who are justified by faith, as it is God’s purpose of election that stands firm.