Since the warriors of the family were called to active duty, the real hope, David, was sent home.  He got sent back on a supply line mission assignment. 

And Jesse said unto David his son, Take now for thy brethren an ephah of this parched corn, and these ten loaves, and run to the camp of thy brethren;  And carry these ten cheeses unto the captain of their thousand, and look how thy brethren fare, and take their pledge.  Now Saul, and they, and all the men of Israel, were in the valley of Elah, fighting with the Philistines.  And David rose up early in the morning, and left the sheep with a keeper, and took, and went, as Jesse had commanded him; and he came to the trench, as the host was going forth to the fight, and shouted for the battle.  For Israel and the Philistines had put the battle in array, army against army.  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.  1 Samuel 17:17-22

David doesn’t hesitate to go into the active battlefield in search of his brothers.  He is a man of valor.  While he is greeting them the big mouth of Palestine sounds off.

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 the men of Israel said, Have ye seen this man that is come up? surely to defy Israel is he come up: and it shall be, that the man who killeth him, the king will enrich him with great riches, and will give him his daughter, and make his father’s house free in Israel.  And David spake to the men that stood by him, saying, What shall be done to the man that killeth this Philistine, and taketh away the reproach from Israel? for who is this uncircumcised Philistine, that he should defy the armies of the living God?  And the people answered him after this manner, saying, So shall it be done to the man that killeth him.  1 Samuel 17:23-27

David isn’t afraid to sound off by asking what the reward is for killing the big boaster.  He is angered by one who disrespects the Lord.  The men around him report to David what the reward will be.  His brothers react much as Joseph’s brothers did long ago.  The Israel of our Messiah will behave in the same way many years later.

And Eliab his eldest brother heard when he spake unto the men; and Eliab’s anger was kindled against David, and he said, Why camest thou down hither? and with whom hast thou left those few sheep in the wilderness? I know thy pride, and the naughtiness of thine heart; for thou art come down that thou mightest see the battle.  And David said, What have I now done? Is there not a cause?  And he turned from him toward another, and spake after the same manner: and the people answered him again after the former manner.  And when the words were heard which David spake, they rehearsed them before Saul: and he sent for him.  1 Samuel 17:28-31

When everyone is mad at the young man, the report gets the attention of Saul.  The king wants to see this bold talking young man.  Does he remember the resume his servants had presented before he first met David?  David asserts his claim to that resume with his own history.  Ability is in the heart of the anointed.

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 said to David, Thou art not able to go against this Philistine to fight with him: for thou art but a youth, and he a man of war from his youth.  And David said unto Saul, Thy servant kept his father’s sheep, and there came a lion, and a bear, and took a lamb out of the flock:  And I went out after him, and smote him, and delivered it out of his mouth: and when he arose against me, I caught him by his beard, and smote him, and slew him.  Thy servant slew both the lion and the bear: and this uncircumcised Philistine shall be as one of them, seeing he hath defied the armies of the living God.  David said moreover, The LORD that delivered me out of the paw of the lion, and out of the paw of the bear, he will deliver me out of the hand of this Philistine. And Saul said unto David, Go, and the LORD be with thee.  1 Samuel 17:32-37

David had history of deliverance from God, and he expected a future of deliverance from God.  He did not claim the glory, but he did not waiver in depending on that glory and it’s author, our God.  Saul recognized that authority and sent him with his blessing.

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.  1 Samuel 17:38-40

Saul tried to equip David as a carnal warrior, but David was trained in spiritual warfare.  He would only use the tools he had trusted as a shepherd serving the Lord.  Round, hard, water polished rocks provided the ideal artillery for a big hard headed target.  The target made himself available.

And the Philistine came on and drew near unto David; and the man that bare the shield went before him.  And when the Philistine looked about, and saw David, he disdained him: for he was but a youth, and ruddy, and of a fair countenance.  And the Philistine said unto David, Am I a dog, that thou comest to me with staves? And the Philistine cursed David by his gods.  And the Philistine said to David, Come to me, and I will give thy flesh unto the fowls of the air, and to the beasts of the field.  Then said David to the Philistine, Thou comest to me with a sword, and with a spear, and with a shield: but I come to thee in the name of the LORD of hosts, the God of the armies of Israel, whom thou hast defied.   This day will the LORD deliver thee into mine hand; and I will smite thee, and take thine head from thee; and I will give the carcases of the host of the Philistines this day unto the fowls of the air, and to the wild beasts of the earth; that all the earth may know that there is a God in Israel.  And all this assembly shall know that the LORD saveth not with sword and spear: for the battle is the LORD’s, and he will give you into our hands.  1 Samuel 17:41-47

The establishment has a history of methods, and it doesn’t like to change or to give up its authority.  He doesn’t like being treated with disrespect when it possesses the high ground.  He makes the little guy come to him, and roars like a professional wrestling goon.  David reduces the formula to the Holy Ghost of spiritual warfare, against which there is no opposition.  Resistance is futile; we are Lord.  David not only threatens Goliath, but also all of Palestine, by the hand of God.  The goon is provoked to make the first move after all.

And it came to pass, when the Philistine arose, and came, and drew nigh to meet David, that David hastened, and ran toward the army to meet the Philistine.  And David put his hand in his bag, and took thence a stone, and slang it, and smote the Philistine in his forehead, that the stone sunk into his forehead; and he fell upon his face to the earth.  So David prevailed over the Philistine with a sling and with a stone, and smote the Philistine, and slew him; but there was no sword in the hand of David.  Therefore David ran, and stood upon the Philistine, and took his sword, and drew it out of the sheath thereof, and slew him, and cut off his head therewith. And when the Philistines saw their champion was dead, they fled.  And the men of Israel and of Judah arose, and shouted, and pursued the Philistines, until thou come to the valley, and to the gates of Ekron. And the wounded of the Philistines fell down by the way to Shaaraim, even unto Gath, and unto Ekron.  And the children of Israel returned from chasing after the Philistines, and they spoiled their tents.  1 Samuel 17:48-53

When the unthinkable happens, the hope of the lost is gone like smoke in the wind.  Their hope was of this world and temporal, not eternal.  Palestine is built on the sand, and it will not stand in the coming storm.  Their hope is in flight that cannot escape the pursuing sword of God.  They are lost.

The gallery is watching the fight with little hope as the Philistines watched with false hope.  The words of David were authenticated only by their deference to the Living God.  That alone is enough to validate and enable the acts of the righteous.  Israel had their hope only because the praise of God reignited some forgotten faith in God.  They witnessed the renewed fire of God in that instant of victory.

And David took the head of the Philistine, and brought it to Jerusalem; but he put his armour in his tent.  And when Saul saw David go forth against the Philistine, he said unto Abner, the captain of the host, Abner, whose son is this youth? And Abner said, As thy soul liveth, O king, I cannot tell.  And the king said, Enquire thou whose son the stripling is.  And as David returned from the slaughter of the Philistine, Abner took him, and brought him before Saul with the head of the Philistine in his hand.  And Saul said to him, Whose son art thou, thou young man? And David answered, I am the son of thy servant Jesse the Bethlehemite.  1 Samuel 17:54-58 

Saul has finally noticed the music maker.  His advisors had called him a man of war, and the youth demonstrated that capacity clearly to everyone.  Saul can’t remember who this young man is, even after making him his armor carrier.  Oh he may have known his name, but he didn’t know who he really was. 

The son of Jesse would carry his ancestry forward to deliver Israel in a far greater way in later generations.  He will be the prototype of spiritual warfare and a prophet of the Messiah.