Spiritual Warfare - Lesson 1 - Pulling Down Strongholds - 2 Cor. 10:4-6. Spiritual warfare is just that, spiritual. It is a battle for truth against false doctrines, evil ideologies, and false beliefs. The battlefield is in the mind and the goal is complete submission to the truth of God’s Word. This lesson introduces us to what it means to pull down the strongholds of false beliefs in our minds.