The Epic Life- 1 Samuel 17:22-24, 32

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.

Leading to Water- 1 Samuel 17:32, 38-40

And David said to Saul, Let no man’s heart fail because of him; thy servant will go and fight with this Philistine.
And Saul armed David with his armour, and he put an helmet of brass upon his head; also he armed him with a coat of mail.
And David girded his sword upon his armour, and he assayed to go; for he had not proved it. And David said unto Saul, I cannot go with these; for I have not proved them. And David put them off him.
And he took his staff in his hand, and chose him five smooth stones out of the brook, and put them in a shepherd’s bag which he had, even in a scrip; and his sling was in his hand: and he drew near to the Philistine.

COMMENTARY

And David said to Saul, Let no man’s heart fail; thy servant will go and fight with this Philistine
When Goliath taunted the Israelite armies there was no one in the ranks willing to face him. Israel was in need of a heroic warrior but no one was answering the call. Now once upon a time that hero might have been King Saul himself, but Saul’s great warrior days were long passed. So someone new was needed to take the mantle, and it was into this vacancy that David entered.

And Saul armed David with his armour, and he put an helmet of brass upon his head
And David said unto Saul, I cannot go with these; And David put them off him
And he took his staff in his hand, and chose him five smooth stones out of the brook
Saul was grateful to receive David into this heroic role, and tried to give him his own tools of the trade. But they were ill-fitting for David and he couldn’t make do with them. Saul was dressing up David to fight the giant in close-combat. Maybe that approach would have worked for Saul, but Saul wasn’t the one going to fight the giant. David was, and David worked better at range. David defended his flocks with sling and stone, not sword and shield.
This was David’s calling now and he needed to go about it is own way, with the strengths he had developed himself, with the skills God had bestowed on him.
There is a great temptation for mentors to hover over, to micromanage, and to make sure things are done the “right way.” But so long as the protégé never finds their own “right” way, they can never realize their full potential. Sooner or later everyone else must leave the room and leave the would-be hero alone with God. That is when one really learns what they are made of.