In Galatians 5:16–18, Paul teaches us how to live the Christian life. The Christian life is lived not by self-effort but by walking in active dependence on the Holy Spirit. As we walk by the Spirit, we are freed from gratifying the desires of the flesh. But the Christian life is not easy! Paul shows us there is a real conflict we should expect. But that tension is evidence of the Spirit’s work within us, not his absence. And in the fight, Paul gives us assurance we can cling to: those led by the Spirit are sons and daughters of God, and if sons and daughters then we are fully supplied by our heavenly Father with everything we need to persevere to the end.