In his commentary on Genesis (Brazos Theological Commentary on the Bible) , Rusty Reno cites a number of patristic sources to support his claim that the new covenant does not mean a rejection of circumcision but rather its expansion. Ambrose: “Circumcision of the past ceases when circumcision of the whole shines forth. So now a man is saved, not in part, but in his whole body . . . . Each of our members must be said to be circumcised if they are devoted to the service of God’s commands.”

In Christ and through His circumcision, we are now all priests, circumcised to the four corners of our bodies.