"Circumcision as a Sign." That's the title of today's episode, which has Genesis 17:9-27 as its main text. In this study, we continue to look at this important chapter on God's covenant with Abraham, this week focusing on the eternal sign of that eternal covenant: circumcision. We'll see that circumcision of the flesh is similar to baptism. And we'll also see that circumcision of the flesh is trumped by circumcision of the heart.