To the chief musician. A psalm of David.

      1 The king shall joy in thy strength, O LORD; and in thy salvation how greatly shall he rejoice!   2 Thou hast given him his heart's desire, and hast not withholden the request of his lips. Selah.   3 For thou preventest him with the blessings of goodness: thou settest a crown of pure gold on his head.   4 He asked life of thee, and thou gavest it him, even length of days for ever and ever.   5 His glory is great in thy salvation: honour and majesty hast thou laid upon him.   6 For thou hast made him most blessed for ever: thou hast made him exceeding glad with thy countenance.

      David here speaks for himself in the first place, professing that his joy was in God's strength and in his salvation, and not in the strength or success of his armies. He also directs his subjects herein to rejoice with him, and to give God all the glory of the victories he had obtained; and all with an eye to Christ, of whose triumphs over the powers of darkness David's victories were but shadows. 1. They here congratulate the king on his joys and concur with him in them (v. 1): "The king rejoices, he uses to rejoice in thy strength, and so do we; what pleases the king pleases us," 2 Sam. iii. 36. Happy the people the character of whose king it is that he makes God's strength his confidence and God's salvation his joy, that is pleased with all the advancements of God's kingdom and trusts God to bear him out in all he does for the service of it. Our Lord Jesus, in his great undertaking, relied upon help from heaven, and pleased himself with the prospect of that great salvation which he was thereby to work out. 2. They gave God all the praise of those things which were the matter of their king's rejoicing. (1.) That God had heard his prayers (v. 2): Thou hast given him his heart's desire (and there is no prayer accepted but what is the heart's desire), the very thing they begged of God for him, Ps. xx. 4. Note, God's gracious returns of prayer do, in a special manner, require our humble returns of praise. When God gives to Christ the heathen for his inheritance, gives him to see his seed, and accepts his intercession for all believers, he give him his heart's desire. (2.) That God had surprised him with favours, and much outdone his expectations (v. 3): Thou preventest him with the blessings of goodness. All our blessings are blessings of goodness, and are owing, not at all to any merit of ours, but purely and only to God's goodness. But the psalmist here reckons it in a special manner obliging that these blessings were given in a preventing way; this fixed his eye, enlarged his soul, and endeared his God, as one expresses it. When God's blessings come sooner and prove richer than we imagine, when they are given before we prayed for them, before we were ready for them, nay, when we feared the contrary, then it may be truly said that he prevented us with them. Nothing indeed prevented Christ, but to mankind never was any favour more preventing than our redemption by Christ and all the blessed fruits of his mediation. (3.) That God had advanced him to the highest honour and the most extensive power: "Thou hast set a crown of pure gold upon his head and kept it there, when his enemies attempted to throw it off." Note, Crowns are at God's disposal; no head wears them but God sets them there, whether in judgment to his land or for mercy the event will show. On the head of Christ God never set a crown of gold, but of thorns first, and then of glory. (4.) That God had assured him of the perpetuity of his kingdom, and therein had done more for him than he was able either to ask or think (v. 4): "When he went forth upon a perilous expedition he asked his life of thee, which he then put into his hand, and thou not only gavest him that, but withal gavest him length of days for ever and ever, didst not only prolong his life far beyond his expectation, but didst assure him of a blessed immortality in a future state and of the continuance of his kingdom in the Messiah that should come of his loins." See how God's grants often exceed our petitions and hopes, and infer thence how rich he is in mercy to those that call upon him. See also and rejoice in the length of the days of Christ's kingdom. He was dead, indeed, that we might live through him; but he is alive, and lives for evermore, and of the increase of his government and peace there shall be no end; and because he thus lives we shall thus live also. (5.) That God had advanced him to the highest honour and dignity (v. 5): "His glory is great, far transcending that of all the neighbouring princes, in the salvation thou hast wrought for him and by him." The glory which every good man is ambitious of is to see the salvation of the Lord. Honour and majesty hast thou laid upon him, as a burden which he must bear, as a charge which he must account for. Jesus Christ received from God the Father honour and glory (2 Pet. i. 17), the glory which he had with him before the worlds were, John xvii. 5. And on him is laid the charge of universal government and to him all power in heaven and earth is committed. (6.) That God had given him the satisfaction of being the channel of all bliss to mankind (v. 6): "Thou hast set him to be blessings for ever" (so the margin reads it), "thou hast made him to be a universal blessing to the world, in whom the families of the earth are, and shall be blessed; and so thou hast made him exceedingly glad with the countenance thou hast given to his undertaking and to him in the prosecution of it." See how the spirit of prophecy gradually rises here to that which is peculiar to Christ, for none besides is blessed for ever, much less a blessing for ever to that eminency that the expression denotes: and of him it is said that God made him full of joy with his countenance.

      In singing this we should rejoice in his joy and triumph in his exaltation.

      5 For thou, O God, hast heard my vows: thou hast given me the heritage of those that fear thy name.   6 Thou wilt prolong the king's life: and his years as many generations.   7 He shall abide before God for ever: O prepare mercy and truth, which may preserve him.   8 So will I sing praise unto thy name for ever, that I may daily perform my vows.

      In these verses we may observe,

      I. With what pleasure David looks back upon what God had done for him formerly (v. 5): Thou, O God! hast heard my vows, that is, 1. "The vows themselves which I made, and with which I bound my soul: thou hast taken notice of them; thou hast accepted them, because made in sincerity, and been well pleased with them; thou hast been mindful of them, and put me in mind of them." God put Jacob in mind of his vows, Gen. xxxi. 13; xxxv. 1. Note, God is a witness to all our vows, all our good purposes, and all our solemn promises of new obedience. He keeps an account of them, which should be a good reason with us, as it was with David here, why we should perform our vows, v. 8. For he that hears the vows we made will make us hear respecting them if they be not made good. 2. "The prayers that went along with those vows; those thou hast graciously heard and answered," which encouraged him now to pray, O God! hear my cry. He that never did say to the seed of Jacob, Seek you me in vain, will not now begin to say so. "Thou hast heard my vows, and given a real answer to them; for thou hast given me a heritage of those that fear thy name." Note, (1.) There is a peculiar people in the world that fear God name, that with a holy awe and reverence accept of and accommodate themselves to all the discoveries he is pleased to make of himself to the children of men. (2.) There is a heritage peculiar to that peculiar people, present comforts, earnests of their future bliss. God himself is their inheritance, their portion for ever. The Levites that had God for their inheritance must take up with him, and not expect a lot like their brethren; so those that fear God have enough in him, and therefore must not complain if they have but little of the world. (3.) We need desire no better heritage than that of those who fear God. If God deal with us as he uses to deal with those that love his name we need not desire to be any better dealt with.

      II. With what assurance he looks forward to the continuance of his life (v. 6): Thou shalt prolong the king's life. This may be understood either, 1. Of himself. If it was penned before he came to the crown, yet, being anointed by Samuel, and knowing what God had spoken in his holiness, he could in faith call himself the king, though now persecuted as an out-law; or perhaps it was penned when Absalom sought to dethrone him, and force him into exile. There were those that aimed to shorten his life, but he trusted to God to prolong his life, which he did to the age of man set by Moses (namely, seventy years), which, being spent in serving his generation according to the will of God (Acts xiii. 36), might be reckoned as many generations, because many generations would be the better for him. His resolution was to abide in God's tabernacle for ever (v. 4), in a way of duty; and now his hope is that he shall abide before God for ever, in a way of comfort. Those abide to good purpose in this world that abide before God, that serve him and walk in his fear; and those that do so shall abide before him for ever. He speaks of himself in the third person, because the psalm was delivered to the chief musician for the use of the church, and he would have the people, in singing it, to be encouraged with an assurance that, notwithstanding the malice of his enemies, their king, as they wished, should live for ever. Or, 2. Of the Messiah, the King of whom he was a type. It was a comfort to David to think, whatever became of him, that the years of the Lord's Anointed would be as many generations, and that of the increase of his government and peace there should be no end. The Mediator shall abide before God for ever, for he always appears in the presence of God for us, and ever lives, making intercession; and, because he lives, we shall live also.

      III. With what importunity he begs of God to take him and keep him always under his protection: O prepare mercy and truth which may preserve him! God's promises and our faith in them are not to supersede, but to quicken and encourage prayer. David is sure that God will prolong his life, and therefore prays that he would preserve it, not that he would prepare him a strong lifeguard, or a well-fortified castle, but that he would prepare mercy and truth for his preservation; that is, that God's goodness would provide for his safety according to the promise. We need not desire to be better secured than under the protection of God's mercy and truth. This may be applied to the Messiah: "Let him be sent in the fulness of time, in performance of the truth to Jacob and the mercy to Abraham." Micah vii. 20; Luke i. 72, 73.

      IV. With what cheerfulness he vows the grateful returns of duty to God (v. 8): So will I sing praise unto thy name for ever. Note, God's preservation of us calls upon us to praise him; and therefore we should desire to live, that we may praise him: Let my soul live, and it shall praise thee. We must make praising God the work of our time, even to the last (as long as our lives are prolonged we must continue praising God), and then it shall be made the work of our eternity, and we shall be praising him for ever. That I may daily perform my vows. His praising God was itself the performance of his vows, and it disposed his heart to the performance of his vows in other instances. Note, 1. The vows we have made we must conscientiously perform. 2. Praising God and paying our vows to him must be our constant daily work; every day we must be doing something towards it, because it is all but little in comparison with what is due, because we daily receive fresh mercies, and because, if we think much to do it daily, we cannot expect to be doing it eternally.