After hearing two people tell him no David responds in 17:34, revealing his life-giving, exuberant heart full of passion for the glory and honor of God. He says, “Your servant used to keep sheep for his father. And when there came a lion, or a bear, and took a lamb from the flock, I went after him and struck him and delivered it out of his mouth. And if he arose against me, I caught him by his beard and struck him and killed him. Your servant has struck down both lions and bears, and this uncircumcised Philistine shall be like one of them, for he has defied the armies of the living God. The Lord who delivered me from the paw of the lion and from the paw of the bear will deliver me from the hand of this Philistine.” Saul responded with a quick word, “Go, the Lord be with you!”
So off David went, unable to bear the weight of Saul’s armor, but instead taking a sling, 5 little stones, and a faith on fire. David then did what no Israelite had done thus far, he spoke back to Goliath, probably in a manner that no one else ever had (17:41-47). Goliath quickly responds, not with words, but by coming at David to end this boy’s youthful boasting. David, again showing great courage and trust in the Lord, ran to meet him, pulled out his sling with one stone in it, slung it and watched his stone sink into the forehead of his foe. The Philistines horrified, watch David use Goliath’s own sword to cut off the champion’s head. They flee.
Well, that’s it. That’s the story. Can you see why this is an epic underdog matchup of history? A boy defeating a well trained champion? No one would believe this unless it were in the Bible.