Circumcised from Moses (Galatians 2:1-10)

"In Him you were circumcised", says the apostle Paul. If we have been circumcised in Christ what is the significance of Titus not being circumcised? Why would the apostle Paul appeal to this precedent? What is so bad about circumcision? Do Peter and Paul bring a different gospel to the circumcised and the uncircumcised? If you are interested in these questions please stay tuned as we listen to, "Circumcised from Moses."