Thousand Foot Crutch - Fly on the Wall
So this song basically encourages us to take back out mind: 2 Corinthians 10:5 take captive every thought and make it obedient to Christ.
don't let those troubled thoughts steal your joy. Talk back; fight back. You are a soldier - that is the approach God gives us (Ephesians 6) and He promises to give us the armor.
Be blessed!