Spiritual warfare is the inner battle to believe the truth of God's word over the daring lies of the enemy.
It is the lie that you believe that brings you under the power of deception.
Truth is an absolute standard by which reality is measured and a lie is anything that contradicts the truth.
Strongholds are mindsets of deception that comes from constantly believing lies.
You will never know the lies the enemy is selling to you if you don't know the truth God has communicated in His word already to you.