And David left his carriage in the hand of the keeper of the carriage, and ran into the army, and came and saluted his brethren.
And as he talked with them, behold, there came up the champion, the Philistine of Gath, Goliath by name, out of the armies of the Philistines, and spake according to the same words: and David heard them.
And all the men of Israel, when they saw the man, fled from him, and were sore afraid.
And David said to Saul, Let no man’s heart fail because of him; thy servant will go and fight with this Philistine.

COMMENTARY

And David ran into the army, and came and saluted his brethren. And there came up the champion, the Philistine of Gath, Goliath by name. And all the men of Israel fled from him, and were sore afraid.
When David visited the army he found Israel in dire straits. A hero was being called for, and not a single one could be found. Thousands of soldiers, to be sure, but not any hero. And among so many fearful, who would have blamed David if he cowered, too? He could have heard that giant’s taunts, shrugged his shoulders and slunk away. No one would have blamed him. If anything he had more excuse than all the rest, for he was still a youth. They were soldiers and he was merely a shepherd!

And David said, Let no man’s heart fail; thy servant will go and fight with this Philistine
Yet David did not slink away, tail between legs. Because in spite of all rational reasons to be scared, he wasn’t. Or if he was, that fear was overrun by the call that he must answer. He was not just a lowly sheepherder, he was a son of God, and obligated to defend his country.
The giant was calling for a challenger, old King Saul was calling for a champion, God was calling for a representative. Many heard the cries, but it was David alone who elected to answer. This is the beginning of David’s great life, and he lived it only because he applied to the position.