What often happens in the church is that we are good at preaching the Gospel of grace to the unconverted, but as soon as someone receives Jesus we give them a form of the Law - "Do this, don't do that." This is precisely what Paul was referring to when he said: "Are you so foolish? Having begun by the Spirit, are you now being perfected by the flesh?" (Galatians 3:3)
Rather than giving people the law as a means to grow, the model that Paul exemplifies to us is pointing people to the Gospel in order to change their hearts. The law aims to suppress behaviors, but that doesn't bring about the heart change which is at the root of the behavior. The Gospel on the other hand is the power of God, by to bring about fundamental transformation of the heart. If one's heart changes, their behavior will inevitably follow.
I've gotten a lot of positive feedback about this teaching. Give it a listen: