Why Was God Merciful to David, the Murderer, and Why Do You and I Need a Nathan in our Lives? #264 David and Bathsheba, Part 2

In our readings today, King David has fallen from grace and committed horrible crimes. God send Nathan - a friend and prophet - to confront David for his evil deeds and to pronounce judgment on him - but also to bring grace. What does this teach us about God's character and why do we still need Nathans in our lives today?