Like Psalm 80, this is another Psalm of revival and "turning." The Psalmist remembers the former mercies of God when He turned himself away, granting mercy instead of wrath (3). Now he prays that God would "turn us," and "revive us again" (4,6). Notice that God does all the turning!
What the Psalmist is praying for is true forgiveness; something that justifies and pardons sin. Forgiveness is a place where the demands of truth can walk hand-in-hand in relationship with mercy. The Psalmist describes them coming together with a kiss. New Testament believers see them married in a perfect union at Calvary. The price for my sins is paid, justice has been met, and I receive mercies pardon! What a beautiful miracle!