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, and we take captive every thought to make it obedient to Christ. (2 Corinthians 10:3-5 NIV84)
Spiritual warfare is both spiritual and mental. Our battle is keeping in perspective God’s power within our minds. This requires humility and submission to God, not just self discipline.