Matthew Henry Commentary Psalms 21:7-13

"For the king trusteth in Jehovah; And through the lovingkindness of the Most High he shall not be moved. Thy hand will find out all thine enemies; Thy right hand will find out those that hate thee. Thou wilt make them as a fiery furnace in the time of thine anger: Jehovah will swallow them up in his wrath, And the fire shall devour them. Their fruit wilt thou destroy from the earth, And their seed from among the children of men. For they intended evil against thee; They conceived a device which they are not able to perform. For thou wilt make them turn their back; Thou wilt make ready with thy bowstrings against their face. Be thou exalted, O Jehovah, in thy strength: So will we sing and praise thy power." — Psalms 21:7-13 (ASV)

The psalmist teaches us to look forward with faith, hope, and prayer to what God would do further. The success with which God blessed David was a type of the total overthrow of all Christ's enemies.

Those who could have had Christ to rule and save them, but rejected him and fought against him, will find the remembrance of it to be a worm that does not die. In contrast, God makes sinners willing by his grace, receives them into his favor, and delivers them from the wrath to come.

May he exalt himself, by his all-powerful grace, in our hearts, destroying all the strongholds 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 it enables him to confer happiness and glory on poor sinners, who are taught to love and trust in him.