It is one thing to realize that in Christ, all the fullness of God dwelt. (2:9).It is quite another thing to see that we are complete in Christ. (2:10). We have received the fullness. But, it is still another huge thing to allow this fullness to operate in our lives. In other words, are we living by the Christ who is in us? Is he the "Head of all (other) rule and authority” in our daily living? Verse 12 says there is a requirement of faith on our part in this operation of God. God has done something in our being through Christ that this fullness might be ours. Do you believe it? At first glance, we might categorize verse 11 through 13+ as verses describing our ability to identify with what Christ done. He died. We died, he was buried. We were buried, and he arose, so we arose, however, this is more than simply doctrinally or historically, identifying with Christ. These verses describe the operation of God. This operation of God are not things that only happened in the past through Christ, but they are the fullness that is in us. He is the means whereby we enjoy him as our fullness. Verse 11 says he circumcised us. Our flesh has been cut away entirely through the work of Christ on the cross. This circumcising Christ lives in us, as the one who’s freed us from our flesh, our self. We no longer need to reference our self at all. Christ is our source. He is our fullness through what he has done upon the Cross. This is why Paul says I am crucified with Christ, and I, my flesh, no longer lives. Then he says we are buried together with him (12). The operation of God has taken us to the grave. What else are you going to do with something that has died? The operation of God discards the dead flesh once and for all. Christ took our sinful flesh to the grave. According to the operation of God, Christ, who knew no sin, officiated over the burial of all of it. That which has died, has life no more. And then most wonderfully we go with him into resurrection. This resurrection is a living. It is His life now constantly supplied as our life. This operation of God after cutting us open, so to speak, dealing with our sinful flesh, officially burying our offensive flesh, then brought us together with Christ into the newness of his life. This life of Christ has been installed in us. This is the fullness that we have received! This is the operation of God! Do you believe it? This is why Paul could say, "As therefore you have received the Christ, Jesus the Lord, walk in Him," (Colossians 2:6). How? Through faith in the operation of God! You received this life now walk in this life. Walking in the life, the fullness, is the evidence of our faith in the Christian life. We live the Christian life through faith in the operation of God!