We are here taught,
I. To bless God (Psa 106:1, Psa 106:2): Praise you the Lord, that is, 1. Give him thanks for his goodness, the manifestation of it to us, and the many instances of it. He is good and his mercy endures for ever; let us therefore own our obligations to him and make him a return of our best affections and services. 2. Give him the glory of his greatness, his mighty acts, proofs of his almighty power, wherein he has done great things, and such as would be opposed. Who can utter these? Who is worthy to do it? Who is able to do it? They are so many that they cannot be numbered, so mysterious that they cannot be described; when we have said the most we can of the mighty acts of the Lord, the one half is not told; still there is more to be said; it is a subject that cannot be exhausted. We must show forth his praise; we may show forth some of it, but who can show forth all? Not the angels themselves. This will not excuse us in not doing what we can, but should quicken us to do all we can.
II. To bless the people of God, to call and account them happy (Psa 106:3): Those that keep judgment are blessed, for they are fit to be employed in praising God. God's people are those whose principles are sound - They keep judgment (they adhere to the rules of wisdom and religion, and their practices are agreeable); they do righteousness, are just to God and to all men, and herein they are steady and constant; they do it at all times, in all manner of conversation, at every turn, in every instance, and herein persevering to the end.
III. To bless ourselves in the favour of God, to place our happiness in it, and to seek it, accordingly, with all seriousness, as the psalmist here, Psa 106:4, Psa 106:5. 1. He has an eye to the lovingkindness of God, as the fountain of all happiness: "Remember me, O Lord! to give me that mercy and grace which I stand in need of, with the favour which thou bearest to thy people." As there are a people in the world who are in a peculiar manner God's people, so there is a peculiar favour which God bears to that people, which all gracious souls desire an interest in; and we need desire no more to make us happy. 2. He has an eye to the salvation of God, the great salvation, that of the soul, as the foundation of happiness: O visit me with thy salvation. "Afford me (says Dr. Hammond) that pardon and that grace which I stand in need of, and can hope for from none but thee." Let that salvation be my portion for ever, and the pledges of it my present comfort. 3. He has an eye to the blessedness of the righteous, as that which includes all good (Psa 106:5): "That I may see the good of thy chosen and be as happy as the saints are; and happier I do not desire to be." God's people are here called his chosen, his nation, his inheritance; for he has set them apart for himself, incorporated them under his own government, is served by them and glorified in them. The chosen people of God have a good which is peculiar to them, which is the matter both of their gladness and of their glorying, which is their pleasure, and their praise. God's people have reason to be a cheerful people, and to boast in their God all the day long; and those who have that gladness, that glory, need not envy any of the children of men their pleasure or pride. The gladness of God's nation, and the glory of his inheritance, are enough to satisfy any man; for they have everlasting joy and glory at the end of them.

Blessed are they that keep judgment,.... Or "observe" (k) it; the righteous judgment of God on wicked men; by which he is known in his justice, holiness, truth, and faithfulness; and by which the inhabitants of the earth observing it, learn to do righteousness, as follows: or else it may intend the word of God, his laws, statutes, and ordinances, after called his judgments, Psa 19:9, which should be observed and kept, as the rule of our actions, walk, and conversation.

And he that doeth righteousness at all times; continually believes in Christ for righteousness, and puts on that as his justifying righteousness; whereby he becomes righteous as he is, Jo1 3:7, and performs acts of righteousness from a principle of grace, as a fruit of regeneration, and an evidence of it, Jo1 2:29, that does it with right views, aims, and ends; not to be justified and saved by it, but because God requires it; and it is for his glory, and to testify subjection to him, and thankfulness for favours received from him. And this is to be done at all times; we should never be weary of well doing, but be always abounding in good works; and happy are those that will be found so doing, such are "blessed" persons: not that their blessedness lies in or arises from righteousness done by them; but this is descriptive of such that are blessed in Christ with the remission of sins, and his justifying righteousness. And these are the proper persons to show forth the mighty acts and praise of the Lord; they are most capable of it, and more likely to perform it with acceptance than any other; see Psa 50:14.

(k) "observarent", Junius & Tremellius; "observantium", Gejerus.