In the battle of David and Goliath, David gives God a doorway into the natural realm to fight on Israel’s behalf! The God of the angel armies shows up and shows out through David as God reveals Himself as the One who fights are battles! David knew Goliath did not belong to the family of Almighty God nor was he in His covenant. He also knew Goliath was not mocking him but actually the God of Israel (Jehovah Tsaba) and that gave Him great confidence to step out on the battlefield!