It’s not that David is unrepentant of the harm he has caused Bathsheba, Uriah, and countless others. The point is that David is repenting of the sin that lies beneath these actions, the sin all of us would rather avoid. He names this sin right after in verse 5: “I was brought forth in iniquity, and in sin did my mother conceive me.”
Justification as Forgiveness
Forgiveness is ours, Luther continually proclaimed, because Christ has put His claim on our sins and taken them as His own to the Cross and into His tomb.