Samuel went and found a guy named Jesse and poured olive oil all over his youngest son's head. At the same time, there was a scary Philistine who stood almost ten feet tall (if the story is to be believed, which it isn't.) David, with his new confidence and skills he'd learned fighting bears and lions, decided to go and slay this giant Philistine (whose name was Goliath.)

King Saul argued at first, but was eventually convinced that David could defeat Goliath and... well I don't need to say any more. We all know this story, right?