Waging War Within: Walking by the Spirit's Power

Paul calls the church to hear Galatians 5 as a field report from the front lines of the Christian life. The Spirit commands, walk by the Spirit and you will not gratify the desires of the flesh. The flesh pushes back, because the desires of the flesh are against the Spirit and the desires of the Spirit are against the flesh, opposed so that the Christian is kept from doing what the renewed heart truly wants. The text is not describing mere body versus ghost. Paul is naming two natures and their motives, the fallen flesh and the new creation by the Spirit, coexisting until glory and fighting inside the same person.

John writes so that the believer may know, not guess, that eternal life is present in Christ. The law exposes guilt and cannot perfect; one failure makes a person guilty of all. Christ redeems from the curse by the cross, so reliance on law-works cuts a person off from grace. Galatians shows why that matters on the ground. The pull toward circumcision sounded like help, but Paul says it empties Christ of advantage. Faith begun by the Spirit is perfected by the same Spirit, not by the flesh taking the wheel.

Romans 7 lays the inner terrain bare. The regenerate person delights in God’s law in the inner being, desires the good, yet feels the drag of indwelling sin. That confession never licenses passivity. Romans 6 orders the believer, do not present your members to sin, because sin no longer has dominion. The war is real precisely because salvation is real.

Paul names the sides. The works of the flesh are evident and plural. The fruit of the Spirit is singular, slow, and often hidden as it ripens into sanctification. Occasional falls do not define the Christian, but an unrepentant practice of the works of the flesh is incompatible with new birth. Those who belong to Christ have crucified the flesh with its passions and desires. The cross has nailed the old tyrant’s hands. It may still shout orders; it cannot command. The Spirit then shows the simple path, simple but not easy. Those who live according to the Spirit set their minds on the things of the Spirit. Abiding in Christ, soaking the mind in the Word, and keeping in step with the Spirit is how a believer fights, how fruit grows, and how assurance steadies in the middle of the struggle.

Key Takeaways

• 1. The Spirit and flesh really war This is not a metaphor to be admired from a distance but a daily clash inside a single life. The new heart wants what God wants, and the old nature resists to keep good desires from ripening into obedience. Assurance is not the absence of conflict but faith that leans into the Spirit’s lead in the conflict. [29:41]
• 2. Grace begun is grace continued Faith starts the Christian life and faith carries it, not a mid-course switch to self-powered law-keeping. Turning to law to secure what Christ already won severs a person from the very grace needed to change. Confidence grows as trust stays anchored in the crucified and risen Christ. [46:34]
• 3. Habit does more than moments Paul warns about practiced, unrepentant sin, not the stumbles that drive a believer back to Christ. The Spirit will not let a Christian make peace with the works of the flesh; repentance becomes the norm, not hardness. Holiness is traced in patterns over time more than in snapshots. [50:20]
• 4. One fruit, slow and real The works of the flesh shout quickly and publicly, but the Spirit’s fruit ripens quietly and together from the same root. Love, joy, and the rest grow as one life, often first seen in altered motives and softened responses. Do not despise the unseen work simply because it is not immediate. [53:41]
• 5. Set the mind, keep in step The path is simple to name and costly to walk. Filling the mind with the things of the Spirit makes space for resistance, clarity, and courage in the moment of temptation. War-time habits of Word, prayer, and worship are how the Spirit trains a believer to hear and follow. [58:11]

Youtube Chapters

• [00:00] - Welcome
• [23:13] - Abide in Christ to bear fruit
• [23:44] - Galatians 5 shifts to the war
• [24:07] - Assurance in the middle of struggle
• [29:41] - Flesh and Spirit in open conflict
• [31:56] - Not ghosts, but true natures
• [34:44] - Why both natures coexist in believers
• [36:37] - Romans 7 and honest comfort
• [39:43] - Don’t make peace with sin
• [41:03] - The war proves salvation is real
• [46:34] - Law or Christ as confidence
• [50:20] - Habitual sin versus repentant fight
• [53:41] - One fruit and patient sanctification
• [57:42] - Keep in step by a renewed mind
• [58:35] - Word-saturated habits that fight back

1. In Galatians 5:17, Paul says the desires of the flesh and Spirit are "opposed to each other." What specific contrast does he draw between the works of the flesh (v. 19-21) and the fruit of the Spirit (v. 22-23)?
2. According to Galatians 5:24, what decisive action have believers already taken toward the flesh? How does this relate to Romans 7:15-25, where Paul describes his inner conflict?
3. The sermon mentions that "occasional falls do not define the Christian, but an unrepentant practice of the works of the flesh is incompatible with new birth" [50:20]. How does this align with Paul’s warning in Galatians 5:21?
4. What does Paul mean by "keep in step with the Spirit" (v. 25), and how does Romans 8:5-6 clarify this instruction?

1. Why does Paul use the plural "works" to describe the flesh’s output but the singular "fruit" for the Spirit’s results? What does this imply about the nature of sin versus sanctification?
2. How does the phrase "you are not under the law" (v. 18) connect to the sermon’s emphasis on grace as a continuous gift rather than a self-powered effort? [46:34]
3. In Romans 7:22-23, Paul says he "delights in the law of God" but feels a "war" in his members. How does this tension validate the reality of the Spirit-flesh conflict for believers, rather than disproving their salvation?
4. The sermon states, "The war is real precisely because salvation is real" [41:03]. How does Galatians 5:16-18 support this idea?

1. "Setting the mind on the things of the Spirit" (Romans 8:5) is described as a daily choice. What specific habits or routines could help you prioritize this mindset when distractions or temptations arise?
2. The fruit of the Spirit often grows quietly in motives and attitudes [53:41]. Where have you noticed subtle changes in your heart (e.g., patience in frustration, kindness toward someone difficult) that reflect the Spirit’s work?
3. When guilt over a "stumble" makes you question assurance, how can Galatians 5:24-25 remind you of your secure identity in Christ while still calling you to fight sin?
4. The sermon warns against replacing grace with "self-powered law-keeping" [46:34]. In what areas of your life do you feel tempted to rely on rules or performance instead of trusting Christ’s finished work?
5. Paul urges believers to "walk by the Spirit" (v. 16). What is one practical step you could take this week to "keep in step with the Spirit," such as memorizing Scripture, fasting from a distraction, or serving someone sacrificially?
6. The sermon highlights "war-time habits of Word, prayer, and worship" [58:11]. Which of these habits feels most neglected in your life? How could you intentionally cultivate it?