Whether we acknowledge it or not, as Christians we are in a war against sin. Here are some key truths to remember as we seek to fight the good fight:
1. As God’s people we are to love him and seek him first above everything else. Do you really think our flesh and our spiritual enemy are going to sit back and let that happen willingly?
Beloved, I urge you as sojourners and exiles to abstain from the passions of the flesh, which wage war against your soul. (1 Pet. 2:11ff)
What causes quarrels and what causes fights among you? Is it not this, that your passions are at war within you? (James 4:1ff)
So I find it to be a law that when I want to do right, evil lies close at hand. For I delight in the law of God, in my inner being, but I see in my members another law waging war against the law of my mind and making me captive to the law of sin that dwells in my members. Wretched man that I am! Who will deliver me from this body of death? (Rom. 7:21-24)
2. Though the battle wages onward, the final victory is secured through the finished work of Jesus Christ.
For everyone who has been born of God overcomes the world. And this is the victory that has overcome the world—our faith. (1 John 5:4)
The sting of death is sin, and the power of sin is the law. But thanks be to God, who gives us the victory through our Lord Jesus Christ. Therefore, my beloved brothers, be steadfast, immovable, always abounding in the work of the Lord, knowing that in the Lord your labor is not in vain. (1 Cor. 15:56-58)
They will make war on the Lamb, and the Lamb will conquer them, for he is Lord of lords and King of kings, and those with him are called and chosen and faithful. (Rev. 17:14)
And when the thousand years are ended, Satan will be released from his prison and will come out to deceive the nations that are at the four corners of the earth, Gog and Magog, to gather them for battle; their number is like the sand of the sea. And they marched up over the broad plain of the earth and surrounded the camp of the saints and the beloved city, but fire came down from heaven and consumed them, and the devil who had deceived them was thrown into the lake of fire and sulfur where the beast and the false prophet were, and they will be tormented day and night forever and ever. (Rev. 20:7-10)
3. We are no longer bound to the enemy. We have died to sin and been made alive to live for the glory of God and good of others.
What shall we say then? Are we to continue in sin that grace may abound? By no means! How can we who died to sin still live in it? Do you not know that all of us who have been baptized into Christ Jesus were baptized into his death? We were buried therefore with him by baptism into death, in order that, just as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life. (Rom. 6:1-4ff)
But that is not the way you learned Christ!—assuming that you have heard about him and were taught in him, as the truth is in Jesus, to put off your old self, which belongs to your former manner of life and is corrupt through deceitful desires, and to be renewed in the spirit of your minds, and to put on the new self, created after the likeness of God in true righteousness and holiness. (Eph. 4:20-24)
4. God gives us grace and power through his Spirit, providing everything we need to fight the good fight.
His divine power has granted to us all things that pertain to life and godliness, through the knowledge of him who called us to his own glory and excellence. (2 Pet. 1:3ff)
Finally, be strong in the Lord and in the strength of his might. Put on the whole armor of God, that you may be able to stand against the schemes of the devil. For we do not wrestle against flesh and blood, but against the rulers, against the authorities, against the cosmic powers over this present darkness, against the spiritual forces of evil in the heavenly places. Therefore take up the whole armor of God, that you may be able to withstand in the evil day, and having done all, to stand firm. (Eph. 6:10-13ff)
5. We do not fight the good fight alone. We fight alongside our brothers and sisters in Christ under the sovereign protection of our God and Savior.
I therefore, a prisoner for the Lord, urge you to walk in a manner worthy of the calling to which you have been called, with all humility and gentleness, with patience, bearing with one another in love, eager to maintain the unity of the Spirit in the bond of peace. (Eph. 4:1-3)
Brothers, if anyone is caught in any transgression, you who are spiritual should restore him in a spirit of gentleness. Keep watch on yourself, lest you too be tempted. Bear one another’s burdens, and so fulfill the law of Christ. (Gal. 6:1-2)
For by the grace given to me I say to everyone among you not to think of himself more highly than he ought to think, but to think with sober judgment, each according to the measure of faith that God has assigned. For as in one body we have many members, and the members do not all have the same function, so we, though many, are one body in Christ, and individually members one of another. (Rom. 12:3-5)
And let us consider how to stir up one another to love and good works, not neglecting to meet together, as is the habit of some, but encouraging one another, and all the more as you see the Day drawing near. (Heb. 10:24-25)