Thoughts that are not in alignment with God’s word

For though we walk in the flesh, we do not war after the flesh:  For the weapons of our warfare are not carnal, but mighty through God to the pulling down of strong holds; Casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ; (2 Corinthians 10:3-5 KJV)