This document summarizes Psalm 9 in 3 sections: 1. The author will praise God with their whole heart for God's wonderful deeds and upholding of justice. 2. God judges the world with righteousness and fairness, providing shelter for the oppressed. 3. The author asks God for mercy in being snatched from death so they can declare God's praises, as the wicked fall into the pits they dug but God does not ignore those in need.