55 When Saul saw David going out against the Philistine, he said to Abner, the commander of the army, “Abner, whose son is this youth?” And Abner said, “As your soul lives, O king, I do not know.” 56 So the king said, “Inquire whose son this young man is.” I Samuel 17:55-56 NKJ
I read the bible story about David killing the giant, Goliath. I love it because God used, David, the shepherd boy to kill the giant. His much bigger brothers and warriors of the King didn't kill the giant nor did King Saul who was head and shoulders above the rest. David, the youth who was the family errand boy, killed the giant bully.
Who was David? He was the youngest boy in his family. He tended the sheep. He would bring lunch to his brothers who fought for the King. That is where he heard Goliath taunting and making fun of the Israelites. This made David mad! How dare he say those things about the children of God! Now David had killed a lion and a bear while tending the sheep with God's help...God would surely help him defeat the giant that was defying the armies of God!
Goliath actually thought it was an insult that they would send the boy to fight him, the mighty Goliath! I am sure it was even a bigger insult when David brought a sling and five stones to fight the giant...but David had God on his side! David slayed Goliath with God's help. He used Goliath's own sword to cut his head off. Showing that God doesn't save with swords or spears but the battle is the Lord's!
Now let me tell you this...David was no longer known as the shepherd boy...from that day forward the name David was known in the land. David, a man after God's own heart. Maybe Saul didn't know who David was...but God did. God used David...a nobody who really was somebody. God knows your name, no matter who you are...and He can use you too.