We are not God's chosen King. We are not David. None of our problems are 'Goliaths' - most of our problems, however serious, are not there to kill us but to make us grow. We do not have to find a modern technique that equates to David's sling and his five stones.
So how is the historical event of David vs Goliath relevant to us today?
1. God's people were overwhelmed
2. God's chosen King was mocked by God's people and the other nations
3. God won a decisive victory through His chosen King
4. God's people plundered their defeated enemy