Anger

 Then David’s anger was greatly kindled against the man, and he said to Nathan, “As the Lord lives, the man who has done this deserves to die,
2 Samuel 12:5 ESV
https://bible.com/bible/59/2sa.12.5.ESV

David's hypocrisy is glaringly obvious in this passage. He had committed adultery with Bathsheba and murdered her husband Uriah. Nathan told a story to illustrate what he had done.

The story goes like this: a filthy rich man had a visitor. Instead of nipping to the shops for his visitor's meal, he stole and slaughtered his poor neighbour's only pet lamb. Understandably, David was angry. He seems to have thought it was a true story.

David burned with self-righteous anger, little knowing that a metaphorical knock out blow was about to come swinging his way. After his sanctimonious speech, Nathan landed a proverbial punch in David's face. 'You are the man!' Nathan insisted.

Thankfully, David got the message. He humbled himself. He repented of his sin. He wrote Psalm 51 as an expression of his sorrow, regret and penitence.

'Lord, thank You for the Nathans in our lives who point out our sins so we can repent and be restored to a right relationship with You. In Jesus' name, amen'