Here is the whole duty of man; for we are taught, 1. To keep our eye upon God's favour as our end: "Lord, I have hoped for thy salvation, not only temporal but eternal salvation. I have hoped for that as my happiness and laid up my treasure in it; I have hoped for it as thine, as a happiness of thy preparing, thy promising, and which consists in being with thee. Hope of this has raised me above the world, and borne me up under all my burdens in it." 2. To keep our eye upon God's word as our rule: I have done thy commandments, that is, I have made conscience of conforming myself to thy will in every thing. Observe here how God has joined these two together, and let no man put them asunder. We cannot, upon good grounds, hope for God's salvation, unless we set ourselves to do his commandments, Rev 22:14. But those that sincerely endeavour to do his commandments ought to keep up a good hope of the salvation; and that hope will both engage and enlarge the heart in doing the commandments. The more lively the hope is the more lively the obedience will be.

My lips shall utter praise,.... Like water flowing from a fountain, as the word (m) signifies. The heart of a good man is like a fountain of water, abounding: with good things, and his mouth is a well of life; out of the abundance of grace and good things in his heart his mouth speaks, Joh 4:14; and particularly his heart is filled with praise and thankfulness for the many blessings of providence and grace enjoyed; his lips show it forth; it comes flowing from him freely and readily, without force and compulsion, largely and plentifully, constantly and continually, and with great vehemence and strength, as streams from a fountain;

when thou hast taught me thy statutes: which is what the psalmist often prays for in this psalm; and signifies he should be very thankful to God for, and should sincerely praise him, could he obtain this favour; see Psa 119:7.

(m) "profundent", Vatablus, Musculus; "ebullient", Piscator, Gejerus; "scaturiunt", Cocceius; "scaturient", Michaelis.