(2Co 10:3) “For though we walk in the flesh, we do not war after the flesh:….(5) 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;” Notice that this warfare first begins with battling self, the old nature, the old flesh. This cannot be effective unless one has been seeking to know and please the Lord, putting His Word in the heart.