For though we live in the world, we do not wage war as the world does. The weapons we fight with are not the weapons of the world. On the contrary, they have divine power to demolish strongholds. We demolish arguments and every pretension that sets itself up against the knowledge of God .2 Corinthians 10:3-5a NIV
When the topic of spiritual warfare comes up it seems like it is usually because someone feels like they are under attack from Satan or his demons. But the conflict we are engaged in is much more than just a defensive struggle. The picture Paul paints here is the offensive side of the battle.
The world wages war with physical weaponry: planes, ships, tanks, guns, and bombs. But those have no value in the spiritual conflict we are a part of. Instead, we have spiritual weapons that have the power to demolish strongholds.
The only spiritual weapon mentioned in the Scripture (Eph. 6:17) is a sword; the sword of the Spirit, the word of God. How do we wield this weapon effectively? First of all, it requires training; how can I really use it if I don’t know what it contains. Practice with it daily, both reading it and applying it. And recognize that it is the Holy Spirit’s sword. Seek the owners advice in how and when to apply the sword. He knows best how to use it.
A stronghold is something that people depend on for safety, like forts of old. Spiritual strongholds are the arguments and pretensions that people use against the knowledge of God. Skillful use of the Spirit’s sword will demolish these strongholds, making them ineffective.
Learn to use the Spirit’s sword effectively and go on the offensive. But do it in love.