Now we understand the proverb better. To improve the countenance of the friend, we help them understand God's commands. Remember we are using this in a technical sense as a metaphor for his command and the result of his command. We would remind our friend that God spoke and as a result of his command, the universe sprang into existence. We might also confront his sin and bring hope  for a changed life based on God's Mercy and power in overcoming sin.