40 Then David took his shepherd's staff, selected five smooth stones from the brook, and put them in the pocket of his shepherd's pack, and with his sling in his hand approached Goliath. 41 As the Philistine paced back and forth, his shield bearer in front of him, he noticed David. 42 He took one look down on him and sneered - a mere youngster, apple-cheeked and peach-fuzzed. 43 The Philistine ridiculed David. "Am I a dog that you come after me with a stick?" And he cursed him by his gods. 44 "Come on," said the Philistine. "I'll make roadkill of you for the buzzards. I'll turn you into a tasty morsel for the field mice." 45 David answered, "You come at me with sword and spear and battle-ax. I come at you in the name of God-of-the-Angel-Armies, the God of Israel's troops, whom you curse and mock. 46 This very day God is handing you over to me. I'm about to kill you, cut off your head, and serve up your body and the bodies of your Philistine buddies to the crows and coyotes. The whole earth will know that there's an extraordinary God in Israel. 47 And everyone gathered here will learn that God doesn't save by means of sword or spear. The battle belongs to God - he's handing you to us on a platter!"
48 That roused the Philistine, and he started toward David. David took off from the front line, running toward the Philistine. 49 David reached into his pocket for a stone, slung it, and hit the Philistine hard in the forehead, embedding the stone deeply. The Philistine crashed, facedown in the dirt. 50 That's how David beat the Philistine - with a sling and a stone. He hit him and killed him. No sword for David! 51 Then David ran up to the Philistine and stood over him, pulled the giant's sword from its sheath, and finished the job by cutting off his head. When the Philistines saw that their great champion was dead, they scattered, running for their lives.
Matthew Henry's Commentary on 1 Samuel 17:40-51
Commentary on 1 Samuel 17:40-47
(Read 1 Samuel 17:40-47)
The security and presumption of fools destroy them. Nothing can excel the humility, faith, and piety which appear in David's words. He expressed his assured expectation of success; he gloried in his mean appearance and arms, that the victory might be ascribed to the Lord alone.
Commentary on 1 Samuel 17:48-58
(Read 1 Samuel 17:48-58)
See how frail and uncertain life is, even when a man thinks himself best fortified; how quickly, how easily, and by how small a matter, the passage may be opened for life to go out, and death to enter! Let not the strong man glory in his strength, nor the armed man in his armour. God resists the proud, and pours contempt on those who defy him and his people. No one ever hardened his heart against God and prospered. The history is recorded, that all may exert themselves for the honour of God, and the support of his cause, with bold and unshaken reliance on him. There is one conflict in which all the followers of the Lamb are, and must be engaged; one enemy, more formidable than Goliath, still challenges the armies of Israel. But "resist the devil, and he will flee from you." Go forth to battle with the faith of David, and the powers of darkness shall not stand against you. But how often is the Christian foiled through an evil heart of unbelief!