The psalm appeals in verses 3-5 of this psalm to God’s justice for the wicked. We all have an internal sense of what might be just. Along with David, we might ask God for the wicked to be repaid for their deeds and receive the punishment they deserve. But, when it comes to us, we ask for mercy we don’t deserve. Isn’t that ironic?
What do we know about David? We know he was not allowed to build the Lord’s temple because he had too much blood on his hands. We know he went to war a lot. We know he had an affair with Bathsheba, and he had Uriah killed. He lied. He succumbed to temptation. He abused his power. David did not really live a blameless life either, did he?