1 Samuel 16:17

16:14-23 Saul is made a terror to himself. The Spirit of the Lord departed from him. If God and his grace do not rule us, sin and Satan will have possession of us. The devil, by the Divine permission, troubled and terrified Saul, by the corrupt humours of his body, and passions of his mind. He grew fretful, peevish, and discontented, and at times a madman. It is a pity that music, which may be serviceable to the good temper of the mind, should ever be abused, to support vanity and luxury, and made an occasion of drawing the heart from God and serious things. That is driving away the good Spirit, not the evil spirit. Music, diversions, company, or business, have for a time often been employed to quiet the wounded conscience; but nothing can effect a real cure but the blood of Christ, applied in faith, and the sanctifying Spirit sealing the pardon, by his holy comforts. All other plans to dispel religious melancholy are sure to add to distress, either in this world or the next.

The medicinal effects of music on the mind and body, especially as appeasing anger, and soothing and pacifying a troubled spirit, are well known. It is deeply interesting to have the youthful David thus brought before us, as using music for its highest purpose, that of turning the soul to the harmony of peace and love. We may infer that some of his Psalms, such e. g. as Psalm 23:1-6 , were already composed.

14-18. The Spirit of the Lord departed from Saul, and an evil spirit from the Lord troubled him—His own gloomy reflections, the consciousness that he had not acted up to the character of an Israelitish king, the loss of his throne, and the extinction of his royal house, made him jealous, irritable, vindictive, and subject to fits of morbid melancholy.

When Saul commanded them to seek out a good player upon a stringed instrument in accordance with this advice, one of the youths (נערים, a lower class of court servants) said, "I have seen a son of Jesse the Bethlehemite, skilled in laying, and a brave man, and a man of war, eloquent, and a handsome man, and Jehovah is with him." The description of David is "a mighty man" and "a man of war" does not presuppose that David had already fought bravely in war, but may be perfectly explained from what David himself afterwards affirmed respecting his conflicts with lions and bears ( 1 Samuel 17:34-35 ). The courage and strength which he had then displayed furnished sufficient proofs of heroism for any one to discern in him the future warrior.