2 Corinthians 10:4-5
We must take control from the enemy our own thoughts. The devil will always feed off our insecurities, doubts and fears. Asking the Holy Spirit to take captive our thoughts/mind is the only side way to go against the spiritual battle we are fighting.
In order to do that we must be purifying our minds with the right substance. We must inundate our mind with the word of God and not of worldly issues. Our thoughts will create what we have in our heart, which makes us who we are. Our words will eventually reveal to everyone if we are a true follower of Christ or a lover of flesh.