For the king trusts in the LORD, and through the mercy of the most High he shall not be moved.
All Commentaries on Psalms 21:7 Go To Psalms 21
Augustine of Hippo
AD 430
8. "For the King hopeth in the Lord." For the King is not proud, but humble in heart, he hopeth in the Lord. "And in the mercy of the Most Highest He shall not be moved" (ver. 7). And in the mercy of the Most Highest His obedience even unto the death of the Cross shall not disturb His humility.