When we listen to worldly music we deny the truth showing a lack of concern for Christ ignore his crown rights and prove we are not straining toward  maturity. Being soldiers more interested with self -titillation than to stand fight and serve the high calling of God. Carousing with the enemy bolstering their dogmas the hand of this soldier forgets how to grasp his weapon. It's one thing to forget the battle and fail to fight, it's quite another to join the enemy in their degradation of the King.