Does Paul say in Galatians that we put our faith in Jesus or work to stop sinning?

One minute Paul says anyone who tries to earn their way to heaven by obeying the law will die. An then he goes on to say don't obey the desires of your sinful nature. OK, I'm confused. Do we put "faith" in Jesus, or do we "work" on trying to stop sinning? Which one? >Galatians 2:16: ". . . by the works of the law no one will be justified" (NLT). > >Galatians 5:18: ". . . but when you are directed by the Spirit, you are not under obligation to the law of Moses" (NLT). Vs >Galatians 5:19-21: ". . . when you follow the results of your sinful nature, the results are very clear: sexual immortality, impurity, lustful pleasure, idolatry, sorcery, hostility, quarreling, jealousy, outbursts of anger, selfish ambition, dissension, division, 21 envy, drunkenness, wild parties, and other sins like these. Let me tell you again, as I have before, that anyone living that sort of life will not inherit the Kingdom of God" (NLT). Its like he tells us it's impossible to obey the law because we are sinners through and through. Therefore put faith in Christ who died for those sins and love one another. But then, he says don't sin, or you won't inherit the kingdom of God. I'm confused.