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.

Let our Lord now command thy servants which are before thee,.... Meaning either themselves, or some of a more inferior rank, who were in some post and office at court, waiters there, such as yeomen of the guards:

to seek out a man who is a cunning player on the harp: a musical instrument much in use in those days:

and it shall come to pass, when the evil spirit from God is upon thee; when in a melancholy mood, and Satan takes the advantage of it to distress and terrify, to spread the gloom, and stir up evil passions, and promote distraction and confusion:

that he shall play with his hand: upon the harp, that being not an instrument of wind, but of hand music:

and thou shalt be well: music being a means of cheering the spirits, and removing melancholy and gloomy apprehensions of things, and so of restoring to better health of body and disposition of mind; and that music has such an effect on the bodies and minds of men is certain from observation and experience in all ages. Music has been found to be medicine to various diseases, not only for the curing of the bite of vipers, and of the tarantula, but for easing the pains of the sciatica, and for helping persons labouring under the disorders of the frenzy (k); and Pythagoras used to compose the mind, and remove the perturbations of it, by the use of the harp (l), the thing here advised to.

(k) A. Gell. Noct. Attic. l. 4. c. 13. Alex. ab Alex. Genial. Dier. l. 2. c. 17. Vid. Philostrat. Vit. Apollon. Tyan. l. 5. c. 7. (l) Seneca de Ira, l. 3. c. 9.

Let our lord now command thy servants, which are before thee, to seek out a man, who is a cunning player on an harp: and it shall come to pass, when the evil spirit from God is upon thee, that he shall play with his hand, and thou shalt be well.

16:16 Be well - And the success confirms their opinion. For although music cannot directly have an influence upon an evil spirit to drive him away; yet, because the devil, as it seems, had not possession of him, but only made use of the passions of his mind, and humours of his body to molest him: and because it is manifest, that music hath a mighty power to qualify and sweeten these, and to make a man sedate and chearful; it is not strange, if the devil had not that power over him when his mind was more composed, which he had when it was disordered; as the devil had less power over lunaticks in the decrease, than in the increase of the moon: Matt 17:15,18. And seeing music prepared the Lord's prophets for the entertainment of the good Spirit, as 2Kings 3:15. Why might it not dispose Saul to the resistance of the evil spirit? And why might not the chearing of his heart, in some measure strengthen him against those temptations of the devil, which were fed by his melancholy humour? And by this means, David without any contrivance of him or his friends, is brought to court, soon after he was anointed to the kingdom. Those whom God designs for any service, his providence will concur with his grace, to prepare and qualify them for it.

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.