| Barnes' Notes on the Bible But I will sing of thy power - That is, I will praise thee for the manifestation of thy power in rescuing me from danger. Yea, I will sing aloud of thy mercy in the morning - When the light dawns; when these troubles are over; when the night of calamity shall have passed by. There is an allusion here, probably, to the fact that they encompassed the place of his abode at night Psalm 59:6, Psalm 59:14; but there is also the implied idea that that night was emblematic of sorrow and distress. The morning would come; morning after such a night of sorrow and trouble; a morning of joy and gladness, when he would feel that he had complete deliverance. Then would he praise God aloud. Compare the notes at Isaiah 21:12. For thou hast been my defense and refuge in the day of my trouble - That is, he looked to the time when he would feel this; when looking back he could say this; when in view of it he would praise God.
Clarke's Commentary on the BibleI will sing of thy power - For it was because thy hand was upon me for good, that I have thus succeeded in my enterprises. Yea, I will sing aloud of thy mercy - I shall publish abroad what thou hast done; and done not for my worthiness, nor for the worthiness of the people; but for thy own mercy's sake. In the day of my trouble - When I came with small means and feeble help, and had the force and fraud of many enemies to contend with, besides the corruption and unfaithfulness of my own people; thou wast then my defense; and in all attacks, whether open or covered, my sure refuge. I will, therefore, sing of thy mercy in the morning - I will hasten to acquit myself of a duty I owe to thee for such singular interpositions of mercy and power.
Gill's Exposition of the Entire BibleBut I will sing of thy power,.... In creating all things out of nothing; in upholding all things in being; in the redemption of his people; in their conversion and calling; in the preservation of them to eternal happiness; in the performance of his promises to them; in the destruction of their enemies; and in their protection: yea, I will sing aloud of thy mercy in the morning; of providential mercies, which are new every morning; and of special mercy in the heart of God, in the covenant of his grace, in redemption, in regeneration, in the pardon of sin, and in eternal life and salvation; for thou hast been my defence; See Gill on Psalm 59:9; and refuge in the day of my trouble; whither he fled, and found protection and safety; See Gill on Psalm 9:9.
The Treasury of David16 But I will sing of thy power; yea, I will sing aloud of thy mercy in the morning: for thou hast been my defence and refuge in the day of my trouble. 17 Unto thee, O my strength, will I:sing: for God is my defence, and the God of my mercy. Psalm 59:16 "But I will sing of thy power." The wicked howl, but I sing and will sing. Their power is weakness, but thine is omnipotence; I see them vanquished and thy power victorious, and for ever and ever will I sing of thee. "Yea, I will sing aloud of thy mercy in the morning." When those lovers of darkness find their game is up, and their midnight howlings die away, then will I lift up my voice on high and praise the lovingkindness of God without fear of being disturbed. What a blessed morning will soon break for the righteous, and what a song will be theirs! Sons of the morning, ye may sigh to-night, but joy will come on the wings of the rising sun, Tune your harps even now, for the signal to commence the eternal music will soon be given; the morning cometh and your sun shall go no more down for ever. "For thou hast been my defence." The song is for God alone, and it is one which none can sing but those who have experienced the lovingkindness of their God. Looking back upon a past all full of mercy, the saints will bless the Lord with their whole hearts, and triumph in him as the high place of their security. "And refuge in the day of my trouble." The greater our present trials the louder will our future songs be, and the more intense our joyful gratitude. Had we no day of trouble, where were our season of retrospective thanksgiving? David's besetment by Saul's bloodhounds creates an opportunity for divine interposition and so for triumphant praise. Psalm 59:17 "Unto thee, O my strength, will I sing." What transport is here! What a monopolising of all his emotions for the one object of praising God! Strength has been overcome by strength; not by the hero's own prowess, but by the might of God alone. See how the singer girds himself with the almightiness of God, and calls it all his own by faith. Sweet is the music of experience, but it is all for God; there is not even a stray note for man, for self, Or for human helpers. "For God is my defence, and the God of my mercy." With full assurance he claims possession of the Infinite as his protection and security. He sees God in all, and all his own. Mercy rises before him, conspicuous and manifold, for he feels he is undeserving and security is with him, undisturbed and impregnable, for he knows that he is safe in divine keeping. Oh, choice song! My soul would sing it now in defiance of all the dogs of hell. Away, away, ye adversaries of my soul, the God of my mercy will keep ye all at bay - "Nor shall th' infernal lion rend Whom he designs to keep."
Geneva Study BibleBut I will sing of thy {n} power; yea, I will sing aloud of thy mercy in the morning: for thou hast been my defence and refuge in the day of my trouble. (n) Who used the policy of a weak woman to confound the enemies strength, 1Sa 19:12.
Jamieson-Fausset-Brown Bible Commentary16, 17. Contrast the lot of God's servant, who employs his time in God's praise. sing aloud . in the morning-when they retire famishing and disappointed, or it may denote delightful diligence in praise, as in Ps 30:5.
Matthew Henry's Concise Commentary59:8-17 It is our wisdom and duty, in times of danger and difficulty, to wait upon God; for he is our defence, in whom we shall be safe. It is very comfortable to us, in prayer, to look to God as the God of our mercy, the Author of all good in us, and the Giver of all good to us. The wicked can never be satisfied, which is the greatest misery in a poor condition. A contented man, if he has not what he would have, yet he does not quarrel with Providence, nor fret within himself. It is not poverty, but discontent that makes a man unhappy. David would praise God because he had many times, and all along, found Him his refuge in the day of trouble. He that is all this to us, is certainly worthy of our best affections, praises, and services. The trials of his people will end in joy and praise. When the night of affliction is over, they will sing of the Lord's power and mercy in the morning. Let believers now, in assured faith and hope, praise Him for those mercies, for which they will rejoice and praise him for ever. | 
