For the word of Jehovah is right. As I have just remarked, the Psalmist first sets forth God's general providence by which he governs the whole world; and he tells us that he so exerts his power in the whole course of his operations, that the most perfect equity and faithfulness shine forth everywhere. Some will have the terms word and work to be synonymous; but I think there is a distinction, and that word means the same thing as counsel or ordinance, while work signifies the effect or execution of his counsel. I grant that here the same subject is repeated in different words, as is the case in other places; but a slight variation will be found in such repetitions, that the same thing may he expressed in various ways. The amount of what is stated is, that whatever God appoints and commands is right; and whatever he brings to pass in actual operation is faithful and true. Meanwhile, it ought to be observed, that the term word is not to be understood of doctrine, but of the method by which God governs the world.

For the word of the Lord is right - The command; the law; the promise of God. Whatever he "says" is right; or, is true. It is worthy of universal belief; and should, therefore, be a reason for praise. The fact that God says a thing is the highest proof that it is true.
And all his works are done in truth - Or rather, "in faithfulness." That is, All that he does is executed faithfully. He does all that he promises, and all that he does is such as to claim universal confidence. Whatever he does is, from the very fact that He does it, worthy of the confidence of all his creatures. None, however they may be affected by what he does, have any reason to doubt that it is perfectly right. God is the only Being of whom we have any knowledge, concerning whom we can feel this certain assurance.

The word of the Lord is right - He is infinitely wise, and can make no mistakes; and all his works are done in truth. All the words, laws, promises, and threatenings of God are perfectly true and just. The dispensations of his providence and mercy are equally so. When he rewards or punishes, it is according to truth and justice.

For the (c) word of the LORD [is] right; and all his (d) works [are done] in truth.
(c) That is, counsel or command in governing the world.
(d) That is, the effect and execution.

For the word of the Lord is right,.... The revealed word of God: the law of God is right; its precepts are holy, just, and good; its sanction or penalty is righteous; it is impartial unto all; it is just in condemning the wicked, and in acquitting believers on the account of Christ's perfect righteousness, by which it is magnified and made honourable: the Gospel part of the word is right; it publishes right and good things; it directs to the right way, to heaven and happiness; it makes men right when it works effectually in them; it engages them to walk in right ways; and its doctrines are right or plain to them that have a spiritual understanding given them; and all this is matter of joy and praise;
and all his works are done in truth; his works of creation are done in the truth of things, with the utmost exactness and accuracy, and are a wonderful display of his power, wisdom, and goodness: his works of providence are according to the counsel of his own will, and are done in the wisest and best manner; and his work of redemption is a proof of his veracity and faithfulness to his covenant oath and promise; and his work of grace upon the hearts of his people is truth in the inward parts; and which, as he has promised to carry on and finish, he is faithful and will do it; in short, his way of acting both towards the godly and ungodly agrees with his promises to the one and his threatenings to the other, and so is in truth; and the whole of this is a reason why the saints should praise the Lord.

Reasons for praise: first, God's truth, faithfulness, and mercy, generally; then, His creative power which all must honor.

Now beings the body of the song. The summons to praise God is supported (1) by a setting forth of His praiseworthiness
(Note: We have adopted the word "praiseworthiness" for the sake of conciseness of expression, in order to avoid an awkward periphrasis, in the sense of being worthy to be praised. - Tr.)
(a) as the God of revelation in the kingdom of Grace. His word is ישׂר, upright in intention, and, without becoming in any way whatever untrue to itself, straightway fulfilling itself. His every act is an act in אמוּנה, truth, which verifies the truth of His word, and one which accomplishes itself. On אהב, equivalent to אהב הוּא, vid., Psalm 7:10; Psalm 22:29. צדקה is righteousness as conduct; משׁפּט is right as a rule of judgment and a state or condition. חסד is an accusative, as in Psalm 119:64 : misericordia Domini plena est terra (the introit for Misercordias Sunday or the second Sunday after Easter).

The word - All God's counsels and commands are wise, and just, and good. His works - All his works of providence agree with his word, and are the accomplishment of his promises or threatenings.