What Does the Cross have to do with Circumcision

Paul gets into the deep details of the Cross in this section of Colossians. What does it mean that we have been circumcised in Christ? What is circumcision of the heart? When was I baptized into the death of Christ? When was the charge against me cancelled? And who are the authorities that Jesus put to shame through His death on the cross? And most of all, what does this all have to do with my freedom in Christ???

Everything! Paul dives in deep...let's dive in also.