David told Goliath, "You come against me with a sword and spear and javelin, but I come against you in the name of the Lord Almighty, the God of the armies of Israel" ( I Sam. 17:45). David chose stones and a sling to slay Goliath, but do you really think his choice of weapons in the natural made a difference? Of course he had learned how to use the stones and sling to protect his flock, but it was on his knees that David really learned to fight; it was singing praise to God that prepared his voice for a battle cry.
Sometimes, whether we like it or not, we just find ourselves in a spiritual battle. Our preparation in prayer and praise makes all the difference. David wrote: "It is God Who arms me with strength and makes my way perfect. He makes my feet like the feet of a deer; He enables me to stand on the heights. He trains my hands for battle; my arms can bend a bow of bronze. You give me Your shield of victory, and Your Right Hand sustains me; You stoop down to make me great. You broaden the path beneath me, so that my ankles do not turn" (Psalm 18:32-36).
"The weapons we fight with are not the weapons of the world. On the contrary, they have divine power to demolish strongholds" (I Cor. 10:4). It worked for David--it works for us! Amen!