Spirit vs Flesh

Apostle Paul: I do not understand what I do. For what I want to do I do not do, but what I hate I do. And if I do what I do not want to do, I agree that the law is good. As it is, it is no longer I myself who do it, but it is sin living in me. I know that nothing good lives in me, that is, in my sinful nature. For I have the desire to do what is good, but I cannot carry it out. For what I do is not the good I want to do; no, the evil I do not want to do—this I keep on doing. Now if I do what I do not want to do, it is no longer I who do it, but it is sin living in me that does it. (Rom 7:15-20)

The word Christian means "little christ". A Christian life is an exchanged life with Christ in us, not we trying to change ourselves to match up the expectation. If we do that, we'll be like what Paul said because there is no good thing dwell in our flesh which is our sin nature. And since we are dead to sin and alive in Christ, (Rom 6:11) therefore we live by renewing our mind in the Spirit and we shall be transformed. Hear Him!