Ultimately, we know that the final son of Abraham and Sarah is who blesses all nations and that is Jesus. And Jesus gives us a sign better than the circumcision given to Abraham. Ours is a circumcision of the heart made inwardly by the Holy Spirit (Romans 2:28). The reason for an inward circumcision is that the true children of Abraham are not the ones who come straight from Abraham’s line, but those who believe in Jesus (Romans 2:29) and are grafted into his line. And just as Abraham’s circumcision was a sign put on his body guaranteeing the fulfillment of the promise that was to come, the New Testament says that the Holy Spirit’s sign in us is our guarantee that all of Jesus’ promises will be fulfilled as well (2 Corinthians 1:22). “and put his Spirit in our hearts to show that we belong only to him.” Christians receive a new name as well. In fact, we are renamed twice. The first name is given to you when you put your faith in Jesus. You are made a new creation (2 Corinthians