For his anger is but for a moment, and his favor is for a lifetime. Weeping may tarry for the night, but joy comes with the morning. (Psalm 30:5, ESV).
David has a lot of things in his life that God could have been angry about. David messed up a lot. Read the Psalms through, you will see all the times where David cried out to God, feeling His anger. You’ll see his tears of pain but then you will read his songs of rejoicing. He knew what we need to remember. God does get angry. We will reap what we sow. God’s anger is strong but His love is stronger and He gives us mercy new every morning!
Prayer: Lord, I can only exist in your mercy.