18 One of the young men answered, "I have seen a son of Jesse the Bethlehemite who is skillful in playing, a man of valor, a warrior, prudent in speech, and a man of good presence; and the Lord is with him." 19 So Saul sent messengers to Jesse, and said, "Send me your son David who is with the sheep." 20 Jesse took a donkey loaded with bread, a skin of wine, and a kid, and sent them by his son David to Saul. 21 And David came to Saul, and entered his service. Saul loved him greatly, and he became his armor-bearer. 22 Saul sent to Jesse, saying, "Let David remain in my service, for he has found favor in my sight." 23 And whenever the evil spirit from God came upon Saul, David took the lyre and played it with his hand, and Saul would be relieved and feel better, and the evil spirit would depart from him.
Matthew Henry's Commentary on 1 Samuel 16:18-23
Commentary on 1 Samuel 16:14-23
(Read 1 Samuel 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.