Read: Romans 7:7-25
For I know that good itself does not dwell 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 I do not do the good I want to do, but 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. Romans 7:18-20
Paul says that as a Christian, redeemed by the grace of God, there is now something within him that wants to do good, that agrees with the Law (because the Law describes God’s holy nature), that says that the Law is right. There is something within that says what the Law tells me to do is right, and I want to do it. But also, there is something else in me that rises up and says No! Even though I determine not to do what is bad, I suddenly find myself in such circumstances that my determination melts away, my resolve is gone, and I end up doing what I had sworn I would not do.
So, what has gone wrong? Paul’s explanation is, It is no longer I who do it; it is sin living in me. Isn’t that strange? There is a division within our humanity. There is the I that wants to do what God wants, but there is also the sin which dwells in me. Human beings are complicated creatures. We have within us a spirit, a soul, and a body. These are distinct. Paul is suggesting here that the redeemed spirit never wants to do what God has prohibited. It agrees with the Law that it is good. And yet there is an alien power, a force that he calls sin, a great beast that is lying still within us until touched by the commandment of the Law. Then it springs to life, and we do what we do not want to do.
This is what we all struggle with. The cry of the heart at that moment is: What a wretched man I am! Who will rescue me from this body of death? (Romans 7:24) Right here you arrive at where the Lord Jesus began the Sermon on the Mount: Blessed are the poor in spirit, for theirs is the kingdom of heaven (Matthew 5:3). Blessed is the man who comes to the end of himself. Blessed is the man who understands his own spiritual bankruptcy. Because this is the point — the only point — where God’s help is given.