To the world, David and Goliath is the quintessential underdog tale, the epitome of the triumph of the the little guy (trivialized in much the same way as “a real cinderella story”). But to the thoughtful reader of Bible (and absolutely to the original audience), Goliath is far from being an insurmountable obstacle to the living God! In that light, pitting David as an underdog is just plain silly. It’s God against Goliath, and David becomes God’s man for the job. So we are meant to see how God raises up one who would be indeed be a true hero in Israel, and one who is meant to be seen most of all as a hero of faith.