David and Goliath is the classic Bible story that even non-Christians know about.  And so this message is a good one to keep “in your back pocket” for telling others about how God works in people’s lives.  Because inevitably, everyone feels like they are battling some giant in their life at one point or another.  And being able to tell them that when faced with impossible odds, this shepherd boy took down a mighty warrior is a great message to link them to the fighting God of Yahweh Tsabaoth.  You may not remember the name, but you know that it was not David alone on that battlefield.  And God is still with us on our battlefields.  Let him win our battles.