Paul exhorteth the Galatians to maintain their Christian liberty, and sheweth that by being circumcised they would forfeit their hopes in Christ. He disclaimeth the preaching of circumcision himself, and condemneth it in others. He adviseth them not to abuse their liberty, but to serve one another in love, which comprehendeth the whole law. The opposition between the flesh and the Spirit: the works of the flesh: the fruits of the Spirit. Advice to walk in the Spirit, and not in vainglorious emulation.