2 Samuel 11-12

Though David was a man who chased after God he was still mired in the works of the flesh. Nothing exposes this fatal flaw clearer than the situation with Bathsheba. David allowed his eyes to wander to another man's house and coveted another man's wife. Then it went downhill from there. David's attempts of concealment led him to violate commandments 10, 7, 9, and 6. I wonder how Nathan reacted when he learned of David's sin? Was it revealed to the prophet in a dream, or vision, or angelic visitation? Nathan knew God's voice and was certainly disillusioned with his king. And must certainly had been afraid for his life when God convicted him to confront the king with his crimes and punishment.
Stuart