For the king - David, the author of the psalm.

Trusteth in the Lord - All these blessings have resulted from his confiding in God, and looking to him for his favor and protection.

And through the mercy of the Most High - The favor of Him who is exalted above all; the most exalted Being in the universe. The word "mercy" here is equivalent to "favor." He had already experienced God's favor; he looked for a continuance of it; and through that favor he was confident that he would never be shaken in his purposes, and that he would never be disappointed.

He shall not be moved - He shall be firmly established. That is, his throne would be firm; he himself would live a life of integrity, purity, and prosperity; and the promises which had been so graciously made to him, and which extended so far into the future, would all be acomplished. The truth taught here is, that however firm or prosperous our way seems to be, the continuance of our prosperity, and the completion of our hopes and our designs, depend wholly on the "mercy" or the favor of the Most High. Confiding in that, we may feel assured that whatever changes and reverses we may experience in our temporal matters, our ultimate welfare will be secure. Nothing can shake a hope of heaven that is founded on his gracious promises as made through a Saviour.

The king trusteth in the Lord - It was not by my skill or valor that I have gained this victory, but by faith in the strong protecting, and conquering arm of Jehovah.

He shall not be moved - Perhaps this may be best understood of him who was David's prototype. His throne, kingdom, and government, shall remain for ever.

For the King trusteth in the Lord,.... That is, the King Messiah, as the Targum paraphrases it; he trusted in the Lord for his support and sustenance as man, for assistance and help in his time of trouble, and for deliverance out of it; he trusted in the Lord that he would hear him for himself, and for his people; and that he would glorify him with all glory, honour, majesty, and blessedness, before spoken of; see Psalm 22:8;

and through the mercy of the most High he shall not be moved; God the Father is the most High; Christ is called the Son of the Highest, and the Spirit the power of the Highest, Luke 1:32; there is mercy with him, which is a ground of hope and trust, in his people, and also in the Messiah; see Psalm 89:28; and some versions make the mercy of the most High to be what the King Messiah trusts in, reading the words (b), "for the King trusteth in the Lord, and in the mercy of the most High"; but the accent "athnach", which distinguishes the propositions, will not admit of it; but the sense is, that because of the mercy, grace, goodness, and faithfulness of God in making and keeping his promises, Christ would not be and was not moved from his trust and confidence in the Lord; nor shall he even be removed from his throne of glory on which he sits; nor from the glorious and happy state in which he is: nor will it ever be in the power of his enemies to displace him; for these in time will be destroyed by him, as the following words show.

(b) So Genebrard, Muis,

7 For the king trusteth in the Lord, and through the mercy of the most High he shall not be moved.

8 Thine hand shall find out all thine enemies: thy right hand shall find out those that hate thee.

9 Thou shalt make them as a fiery oven in the time of thine anger: the Lord shall swallow them up in his wrath, and the fire shall devour them.

10 Their fruit shalt thou destroy from the earth, and their seed from among the children of men.

11 For they intended evil against thee: they imagined a mischievous device, which they are not able to perform.

12 Therefore shalt thou make them turn their back, when thou shalt make ready thine arrows upon thy strings against the face of them.

13 Be thou exalted, Lord, in thine own strength: so will we sing and praise thy power.

Psalm 21:7

"For the king trusteth in the Lord." Our Lord, like a true King and leader, was a master in the use of the weapons, and could handle well the shield of faith, for he has set us a brilliant example of unwavering confidence in God. He felt himself safe in his Father's care until his hour was come, he knew that he was always heard in heaven; he committed his cause to him that judgeth right, and in his last moments he committed his spirit into the same hands. The joy expressed in the former verses was the joy of faith, and the victory achieved was due to the same precious grace. A holy confidence in Jehovah is the true mother of victories. This Psalm of triumph was composed long before our Lord's conflict began, but faith overleaps the boundaries of time, and chants her "Io triumphe," while yet she sings her battle song.

"Through the mercy of the Most High he shall not be moved." Eternal mercy secures the mediatorial throne of Jesus. He who is Most High in every sense, engages all his infinite perfections to maintain the throne of grace upon which our King in Zion reigns. He was not moved from his purpose, nor in his sufferings, nor by his enemies, nor shall he be moved from the completion of his designs. He is the same yesterday, today, and for ever. Other empires are dissolved by the lapse of years, but eternal mercy maintains his growing dominion evermore; other kings fail because they rest upon an arm of flesh, but our monarch reigns on in splendour because he trusteth in Jehovah. It is a great display of divine mercy to men that the throne of King Jesus is still among them: nothing but divine mercy could sustain it, for human malice would overturn it tomorrow if it could. We ought to trust in God for the promotion of the Redeemer's kingdom, for in Jehovah the King himself trusts: all unbelieving methods of action, and especially all reliance upon mere human ability, should be for ever discarded from a kingdom where the monarch sets the example of walking by faith in God.

Psalm 21:8

"Thine hand shall find out all thine enemies: thy right hand shall find out those that hate thee." The destruction of the wicked is a fitting subject for joy to the friends of righteousness; hence here, and in most scriptural Songs, it is noted with calm thanksgiving. "Thou hast put down the mighty from their seats," is a note of the same song which sings, "and hast exalted them of low degree." We pity the lost for they are men, but we cannot pity them as enemies of Christ. None can escape from the wrath of the victorious King, nor is it desirable that they should. Without looking for his flying foes he will find them with his hand, for his presence is about and around them. In vain shall any hope for escape, he will find out all, and be able to punish all, and that too with the ease and rapidity which belong to the warrior's right hand. The finding out relates, we think, not only to the discovery of the hiding-places of the haters of God, but to the touching of them in their tenderest parts, so as to cause the severest suffering. When he appears to judge the world hard hearts will be subdued into terror, and proud spirits humbled into shame. He who has the key of human nature can touch all its springs at his will, and find out the means of bringing the utmost confusion and terror upon those who aforetime boastfully expressed their hatred of him.

Psalm 21:9

"Thou shalt make them as a fiery oven in the time of thine anger." They themselves shall be an oven to themselves and so their own tormentors. Those who burned with anger against thee shall be burned by thine anger. The fire of sin will be followed by the fire of wrath. Even as the smoke of Sodom and Gomorrah went up to heaven, so shall the enemies of the Lord Jesus be utterly and terribly consumed. Some read it, "thou shalt put them as it were into a furnace of fire." Like faggots cast into an oven they shall burn furiously beneath the anger of the Lord; "they shall be cast into a furnace of fire, there shall be weeping and gnashing of teeth." These are terrible words, and those teachers do not well who endeavour by their sophistical reasonings to weaken their force. Reader, never tolerate slight thoughts of hell, or you will soon have low thoughts of sin. The hell of sinners must be fearful beyond all conception, or such language as the present would not be used. Who would have the Son of God to be his enemy when such an overthrow awaits his foes? The expression, "the time of thine anger," reminds us that as now is the time of his grace, so there will be a set time for his wrath. The judge goes upon assize at an appointed time. There is a day of vengeance of our God; let those who despise the day of grace remember this day of wrath.

continued...

(Heb.: 21:8-9) With this strophe the second half of the Psalm commences. The address to God is now changed into an address to the king; not, however, expressive of the wishes, but of the confident expectation, of the speakers. Hengstenberg rightly regards Psalm 21:8 as the transition to the second half; for by its objective utterance concerning the king and God, it separates the language hitherto addressed to God, from the address to the king, which follows. We do not render Psalm 21:8: and trusting in the favour of the Most High - he shall not be moved; the mercy is the response of the trust, which (trust) does not suffer him to be moved; on the expression, cf. Proverbs 10:30. This inference is now expanded in respect to the enemies who desire to cause him to totter and fall. So far from any tottering, he, on the contrary, makes a victorious assault upon his foes. If the words had been addressed to Jahve, it ought, in order to keep up the connection between Psalm 21:9 and Psalm 21:8, at least to have been איביו and שׁנאיו (his, i.e., the king's, enemies). What the people now hope on behalf of their king, they here express beforehand in the form of a prophecy. מצא ל (as in Isaiah 10:10) and מצא seq. acc. (as in 1 Samuel 23:17) are distinguished as: to reach towards, or up to anything, and to reach anything, attain it. Supposing ל to represent the accusative, as e.g., in Psalm 69:6, Psalm 21:9 would be a useless repetition.

For the king trusteth in the LORD, and through the mercy of the most High he shall not be moved.

Margin trusteth

See Scofield Note: "Ps 2:12".

7. The mediate cause is the king's faith, the efficient, God's mercy.

21:7-13 The psalmist teaches to look forward with faith, and hope, and prayer upon what God would further do. The success with which God blessed David, was a type of the total overthrow of all Christ's enemies. Those who might have had Christ to rule and save them, but rejected him and fought against him, shall find the remembrance of it a worm that dies not. God makes sinners willing by his grace, receives them to his favour, and delivers them from the wrath to come. May he exalt himself, by his all-powerful grace, in our hearts, destroying all the strong-holds of sin and Satan. How great should be our joy and praise to behold our Brother and Friend upon the throne, and for all the blessings we may expect from him! yet he delights in his exalted state, as enabling him to confer happiness and glory on poor sinners, who are taught to love and trust in him.