John’s powerful rebuke to the crowds gathered at the Jordan River reveals a profound shift in God’s plan for salvation. When John tells the crowd that their claim to Abraham as their forefather isn’t enough to save them (Matthew 3:9), he’s laying the groundwork for a new covenant that Jesus would usher in—a covenant that wasn’t based on bloodline but on faith. This is a critical moment in understanding the transition from the old way of thinking, where lineage determined your identity as part of God’s people, to the new way, where it’s faith in Christ that defines who belongs to God.
In the Old Testament, the promise to Abraham was deeply connected to his descendants—God chose Abraham and promised that through his offspring, all nations would be blessed (Genesis 12:3). The Jewish people took pride in being Abraham’s physical descendants, as this bloodline represented their covenant relationship with God. But John’s rebuke highlights a truth that had been foreshadowed throughout the Old Testament: salvation has always been about more than just physical descent.
Even before Jesus came, there were those who were saved not by their bloodline but by their faith. Rahab, a Canaanite prostitute, was not part of the family of Abraham by blood, yet she is included in the genealogy of Jesus because of her faith and her actions in protecting the Israelite spies (Joshua 2, Matthew 1:5). Similarly, Ruth, a Moabite widow, was not an Israelite by birth, but her faithfulness to God and her trust in His provision brought her into the fold of God’s people (Ruth 1:16, Ruth 4). These women—outsiders by all human standards—were saved by their faith, and they became part of the lineage through which Jesus, the Savior, came.
What John was doing in his rebuke was preparing the people for the truth that Jesus would soon reveal: that God’s plan had always been bigger than a single nation or bloodline. Jesus came to bring that plan to completion, fulfilling the promises made to Abraham while expanding them. No longer would salvation be confined to those who could trace their ancestry back to Abraham; now, anyone who has faith in Christ is considered a child of Abraham (Galatians 3:7). Jesus took the bloodline of Abraham, the promise made to one family, and fulfilled it so completely that it could be opened up to the whole world.
This is incredibly good news for us today because it means that salvation is not something we inherit or earn through who we are or what we do. It’s a gift of grace that comes through faith in Jesus. Just like Rahab and Ruth, we are invited into God’s family, not by our lineage or our efforts, but by trusting in Him. And just as they were counted righteous through their faith before Jesus’ death and resurrection, we are now made right with God through the finished work of Jesus on the cross.
This message is particularly significant in our time, where people often find their identity in their background, status, or achievements. Jesus’ invitation is open to all, regardless of their past, their family, or their mistakes. The promise that began with Abraham, was carried through his bloodline, and was fulfilled in Jesus is now extended to all who would believe.
In Jesus, the bloodline of Abraham is brought to completion, and a new, better promise is made available to us all: salvation through faith. Just as Rahab and Ruth were brought into God’s family by faith, so too can we become part of His family, united not by blood, but by the Spirit of God that draws us to faith in Christ. That is the true fulfillment of God’s plan and the good news we celebrate today.