Here is, 1. A great favour which David expects from God, that he will teach him his statutes. This he had often prayed for in this psalm, and urged his petition for it with various arguments; and now that he is drawing towards the close of the psalm he speaks of it as taken for granted. Those that are humbly earnest with God for his grace, and resolve with Jacob that they will not let him go unless he bless them with spiritual blessings, may be humbly confident that they shall at length obtain what they are so importunate for. The God of Israel will grant them those things which they request of him. 2. The grateful sense he promises to have of that favour: My lips shall utter praise when thou hast taught me. (1.) Then he shall have cause to praise God. Those that are taught of God have a great deal of reason to be thankful, for this is the foundation of all these spiritual blessings, which are the best blessings, and the earnest of eternal blessings. (2.) Then he shall know how to praise God, and have a heart to do it. All that are taught of God are taught this lesson; when God opens the understanding, opens the heart, and so opens the lips, it is that the mouth may show forth his praise. We have learned nothing to purpose if we have not learned to praise God. (3.) Therefore he is thus importunate for divine instructions, that he might praise God. Those that pray for God's grace must aim at God's glory, Eph 1:12.

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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