I always thought that it was reference to the Scripture. The sword and my heart being the Bible (Eph. 6:17) and your weapons are useless, drop the gun, my war is not with someone like you, going back to the scripture "We wrestle not with flesh and blood but with principalities..." (Eph. 6:12). The through my throat, giving me thought to speak, is the prayer that is used to fight spiritual battles. The concrete eyes are the physical eyes that cannot see things spiritual things. That's just what I always thought though.
I always thought that it was reference to the Scripture. The sword and my heart being the Bible (Eph. 6:17) and your weapons are useless, drop the gun, my war is not with someone like you, going back to the scripture "We wrestle not with flesh and blood but with principalities..." (Eph. 6:12). The through my throat, giving me thought to speak, is the prayer that is used to fight spiritual battles. The concrete eyes are the physical eyes that cannot see things spiritual things. That's just what I always thought though.