As I drive to work I give an overview of Galatians chapters 4-6 from studying the epistle the previous night.
Paul explains how Jesus came to fulfill the law. He makes an analogy of two very different covenants with Sarah and Hagar to contrast promise with bondage.
Paul shows how liberty via the fruit of the Spirit is better than bondage to circumcision and law-keeping for righteousness.
Those who are spiritual restore those who have faltered.