Say unto God, How terrible art thou in thy works! Here he proceeds to state the grounds why he would have us to praise God. Many content themselves with coldly descanting to others of his praises, but with the view of awakening and more deeply impressing our hearts, he directs us to address ourselves immediately to God. It is when we hold converse with him apart, and with no human eye to witness us, that we feel the vanity of hypocrisy, and will be likely to utter only what we have well and seriously meditated in our hearts. Nothing tends more to beget a reverential awe of God upon our spirits than sisting ourselves in his presence. What the Psalmist adds is fitted and designed to produce the same feeling, that through the greatness of God's power, his enemies feign submission to him Are they who would perversely and obstinately revolt from his service, forced to humble themselves before him, whether they will it or not, how much more, then, ought his own children to serve him, who are invited into his presence, by the accents of tenderness, instead of being reduced to subjection by terror? There is an implied contrast drawn between the voluntary homage which they yield, as attracted by the sweet influences of grace, and that slavish obedience which is wrung reluctantly from the unbeliever. The Hebrew word here used for to lie, signifies to yield such a submission as is constrained, and not free or cordial, as Psalm 18:45. Neither the words nor the scope favor the other senses which have been suggested, as, that his enemies would acknowledge themselves to have been deceived in their hopes, or that they would deny having ever intended hostilities against him. There are many ways in which hypocrites may lie, but nothing more is meant by the Psalmist here, than that the power of God is such as to force them into a reluctant subjection.

Say unto God - In your songs of praise. Let your songs be directly addressed to him, setting forth the grounds of that praise, or the reasons why it is due to him.
How terrible art thou in thy works! - How fearful! how much to be reverenced! The meaning is, that the manifestations of his power and greatness, in the events which occur under his government, are suited to impress the mind with awe and reverence.
Through the greatness of thy power - By the putting forth of thy power. Or, Thou hast such power over thine enemies as to be able to compel them to submit to thee.
Shall thine enemies submit themselves unto thee - Margin, Lie, or yield reigned obedience. The Hebrew word means to lie, to speak lies; then, to feign, to flatter, to play the hypocrite. It is thus applied to the vanquished, who make a hollow profession of submission and love to their victors. See the word explained in the notes at Psalm 18:44; compare Psalm 81:15; Deuteronomy 33:29; Job 31:28. The meaning here is, that he had power to subdue them, and to compel them to acknowledge his right to reign. It is the putting forth of mere power which is here referred to; and all that such power can do, is to secure outward and reigned submission. It cannot of itself secure the submission of the heart, the will, and the affections. That is to be secured by love, not by power; and the difference between the submission of the true people of God and that of all others is that the former are subdued by love, the latter by power; the submission of the former is genuine, that of the latter is forced. The inhabitants of heaven will be submissive to God because they love him; the dwellers in hell will be restrained by power, because they cannot deliver themselves. So now, the submission of a true child of God is that of love, or is a willing submission; the submission of a hypocrite is that of fear, when he feigns obedience because he cannot help it, or because he simply dreads the wrath of God. The object here is to celebrate the power of God, and it was sufficient, in order to set that forth, to say that it awed, and outwardly subdued the enemies of God.

How terrible art thou - Consider the plagues with which he afflicted Egypt before he brought your fathers from their captivity, which obliged all his enemies to submit.
Thine enemies submit themselves - Literally, lie unto thee. This was remarkably the case with Pharaoh and the Egyptians. They promised again and again to let the people go, when the hand of the Lord was upon them: and they as frequently falsified their word.

Say unto God, How terrible [art thou in] thy works! through the greatness of thy power shall thine enemies (b) submit themselves unto thee.
(b) As the faithful obey God willingly, so the infidels disguise themselves as obedient out of fear.

Say unto God,.... Or, "concerning God" (t), as some; or, "before God", as the Targum; say to him as follows, in psalms and hymns of praise:
how terrible art thou in thy works! or "reverend" (u); to be feared and reverenced with a godly fear on account of them; such as the works of nature and providence, which are stupendous and marvellous, fearfully and wonderfully wrought; and especially those of grace and redemption, in which the goodness of Christ is manifest, and for which he is to be feared: unless rather his judgments upon his enemies are here meant; who, though he is a Lamb to his own people, is the Lion of the tribe of Judah to them, whom he will break in pieces as a potter's vessel it may be read, "how terrible", or "tremendous", is everyone of "thy works"; so Aben Ezra, and also Jarchi, who interprets the next clause,
through the greatness of thy power, thus,
"when thou showest to the world thy power, by the pestilence, or sword, or famine, or lightnings:''
shall thine enemies submit themselves unto thee? in a lying, flattering, and deceitful manner, as the word (w) here used signifies; See Gill on Psalm 18:44; or, as the above interpreters,
"they shall, through the greatness of fear, confess the lies and transgressions they have committed.''
It will be a forced, and not a free, confession and submission; Christ's enemies, whether they will or not, will be obliged to own that he is Lord, to the glory of God the Father, Philippians 2:10.
(t) "dicite de Deo", Campensis apud Gejerum; and some in Michaelis. (u) "reverendus", Junius & Tremellius. (w) "mentientur", V. L. Musculus, Montanus; "mendaciter se dedunt", Junius & Tremellius, Piscator, Amama.

A specimen of the praise.
How terrible--(Compare Psalm 65:8).
submit--(Compare Margin), show a forced subjection (Psalm 18:44), produced by terror.