10 A final word: Be strong in the Lord and in his mighty power. 11 Put on all of God’s armor so that you will be able to stand firm against all strategies of the devil.12 For we are not fighting against flesh-and-blood enemies, but against evil rulers and authorities of the unseen world, against mighty powers in this dark world, and against evil spirits in the heavenly places.
13 Therefore, put on every piece of God’s armor so you will be able to resist the enemy in the time of evil. Then after the battle you will still be standing firm. 14 Stand your ground, putting on the belt of truth and the body armor of God’s righteousness. 15 For shoes, put on the peace that comes from the Good News so that you will be fully prepared. 16 In addition to all of these, hold up the shield of faith to stop the fiery arrows of the devil. 17 Put on salvation as your helmet, and take the sword of the Spirit, which is the word of God.
18 Pray in the Spirit at all times and on every occasion. Stay alert and be persistent in your prayers for all believers everywhere.
19 And pray for me, too. Ask God to give me the right words so I can boldly explain God’s mysterious plan that the Good News is for Jews and Gentiles alike.20 I am in chains now, still preaching this message as God’s ambassador. So pray that I will keep on speaking boldly for him, as I should.
21 To bring you up to date, Tychicus will give you a full report about what I am doing and how I am getting along. He is a beloved brother and faithful helper in the Lord’s work. 22 I have sent him to you for this very purpose—to let you know how we are doing and to encourage you.
23 Peace be with you, dear brothers and sisters, and may God the Father and the Lord Jesus Christ give you love with faithfulness. 24 May God’s grace be eternally upon all who love our Lord Jesus Christ.
It’s about our battle being in our mind, once again. All the pieces of the armor are defensive. The only aggressive piece in the armor is the sword–the word of God. We are also told to be aggressive in resisting the Devil. But I think it has to be more than just “Get behind me Satan.”
In Matthew 4, when Satan tempted Jesus in the wilderness, Jesus used the scriptures as a weapon against Satan, and three times Satan left him alone. Satan only leaves us alone when we brandish the sword–God’s word.
If I don’t have the word of God hidden in my heart, I end up being defenseless against the Devil.