I love the story of the little guy, especially when God is in your camp. Many times I have felt small compared to an adversary, yet He has come through for me. So, here's my version of David and Goliath...not people, but bugs.
And David said, "The Lord who rescued me from the hand of the lion, and from the hand of the bear, he himself will free me from the hand of this Philistine." Then Saul said to David, "Go, and may the Lord be with you."
1 Samuel 17:37