David's heart is still upon praising God; and therefore, 1. He prays that God would give him time to praise him: "Let my soul live, and it shall praise thee, that is, let my life be prolonged, that I may live to thy glory." The reason why a good man desires to live is that he may praise God in the land of the living, and do something to his honour. Not, "Let me live and serve my country, live and provide for my family;" but, "Let me live that, in doing this, I may praise God here in this world of conflict and opposition." When we die we hope to go to a better world to praise him, and that is more agreeable for us, though here there is more need of us. And therefore one would not desire to live any longer than we may do God some service here. Let my soul live, that is, let me be sanctified and comforted, for sanctification and comfort are the life of the soul, and then it shall praise thee. Our souls must be employed in praising God, and we must pray for grace and peace that we may be fitted to praise God. 2. He prays that God would give him strength to praise him: "Let thy judgments help me; let all ordinances and all providences" (both are God's judgments) "further me in glorifying God; let them be the matter of my praise and let them help to fit me for that work."

I have gone astray like a lost sheep,.... In desert places, as it is the nature of sheep to do (o). A sheep he was, a sheep of Christ, given him by the Father; known by him, and that knew him; knew his voice, and followed him; a sheep of his hand, and of his pasture; one of the lost sheep of the house of Israel, who had been lost in Adam, though recovered by grace; and had gone astray before conversion, but now returned to the Shepherd and Bishop of souls; and since conversion had gone astray from the Shepherd and fold, from the word and precepts of it, through inadvertence, the prevalence of corruption, the snares of the world, and the temptations of Satan; which he both deprecates and owns, Psa 119:10; though it may be understood, as it is by many interpreters, of his being forced, by the persecutions of his enemies, to wander from the courts of God, and from place to place:

seek thy servant; as a shepherd does his sheep when gone astray, which will not return of itself unless sought after: thou art my Shepherd, as if he should say, look me up, restore my soul; suffer me not to wander from thee, and go astray from thy word and ordinances: and when he calls himself his servant, it carries in it an argument for being looked up and sought out; since he was his servant, not by nature, but by grace; not by force, but willingly; he was his and devoted to his service. And another follows:

for I do not forget thy commandments; he retained a knowledge of them, an affection for them, and a desire to observe them; though he had gone astray from them, either in a criminal way, through the power and prevalence of sin, or against his will, through the force of persecution.

(o) So Aristotle observes, Hist. Animal. l. 9. c. 3. the same word that is used for feeding sheep is also translated "wander", Num. xiv. 33. so "errant" is used by Virgil for feeding with security, Bucolic. Eclog. 2, Vid. Servium in ib.

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