Verse 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 examples of walking by faith in God.
EXPLANATORY NOTES AND QUAINT SAYINGS
Verse 4-8. See Psalms on "Psalms 21:4" for further information.
HINTS FOR PASTORS AND LAYPERSONS
Verse 7. Jesus, and example of faith and of its results.