Abraham had many descendants, but who truly belonged to his family? It wasn't about biology, but belief.
In Galatians 3:7, Paul makes a bold claim: 'Know then that it is those of faith who are the sons of Abraham.' This isn't just a casual observation; it's a foundational argument. The Jewish people of Paul's day proudly claimed Abraham as their father, relying on their physical descent. But Paul cuts through that pride.
He emphasizes that the defining characteristic of Abraham's true 'children' – his spiritual offspring – is faith. Just as Abraham believed God when promises seemed impossible, so too are those who place their trust in God, particularly in Jesus Christ, counted as Abraham's spiritual family.
This shifts the understanding of inheritance from lineage to belief. It means belonging to God's family isn't predetermined by birth, but by a living, active faith.