You foolish Galatians, who has bewitched you, before whose eyes Jesus Christ was publicly portrayed as crucified? This is the only thing I want to find out from you: did you receive the Spirit by the works of the Law, or by hearing with faith? Are you so foolish? Having begun by the Spirit, are you now being perfected by the flesh?...Even so Abraham believed God, and it was reckoned to him as righteousness....For as many as are of the works of the Law are under a curse; for it is written, " Cursed is everyone who does not abide by all things written in the book of the law, to perform them." Now that no one is justified by the Law before God is evident; for, "the righteous man shall live by faith." However, the Law is not of faith; on the contrary, "He who practices them shall live by them."Paul is getting to the heart of his letter to the Galatians. They were being taught by Pharisaical Christians that, having received Christ, they now needed to follow the Law. This is a proposition that Paul soundly rejects.
We are told in Ephesians, "For by grace you have been saved through faith; and that not of yourselves, it is the gift of God; not as a result of works, so that no one may boast." [Ephesians 2:8-9 NASB]
We are taught in most churches that we can come to Christ just as we are. We don't need to get cleaned up first. We don't need to make ourselves righteous or holy (as indeed we can't). Jesus loved us enough to die a horrible and painful death on the cross to pay the price of our sins, and He saves us by His grace.
But after we have been saved, why do so many churches - like the Galatians - add on rules and rituals that we are supposed to live by. Having received the Spirit of God by faith, we cannot grow in the Spirit by any work of the flesh, but only by faith.
The lesson of Romans 7 is that it is impossible to follow the Law, or to gain righteousness by following the law. If you say, "I don't follow the Law of Moses" but you have made your own rules for how to live righteously before God, then you have created your own Law, and are bound by it. If you agree to follow the rules set down by a church, then that church has place you under its own Law, and again, you are bound by it.
As we are told in today's passage, "For as many as are of the works of the Law are under a curse; for it is written, "Cursed is everyone who does not abide by all things written in the book of the law, to perform them." You bring a curse upon yourself if you try to live according to rules, because it is impossible to live by them. But Jesus died so you can be free from that curse.
To live righteously before God, you need to throw out the rule book. Some may ask, "Does that mean there's no such thing as right and wrong? Can I do anything that comes to mind without sinning if there are no rules?" Not at all!
Stop living by the rules and start living by faith in Jesus. The Spirit of the Christ is within you. Trust Him to lead you. He will never lead you into sin, but will cause you to grow in faith and righteousness.
If there is a particular sin that plagues you, such as gambling, lying, drunkenness, pornography, or whatever, the only path to true freedom from that sin is through faith. Abandon the law in your heart that says, "don't do this". You know from experience that the flesh keeps coming back to it in defiance of your own law. Stop working so hard to not sin. Any attempt on your part to not sin is itself and act of the flesh, and only strengthens your flesh to sin more.
When temptation comes, instead of trying to resist, turn your mind toward Jesus, and place your trust in the Holy Spirit who lives within you. He will show you a better way, and lead you into righteousness, as we are told, "the righteous man shall live by faith."