Psalm 18 is the first long Psalm in the Psalter and is quoted in 2 Samuel 22 with a few minor differences. The fascinating part is that 2 Samuel 22 presents Psalm 18 as David's last words. Looking backward over a lifetime of warfare, David praises God's deliverance from his enemies, especially from King Saul. It is therefore, a Psalm of thanksgiving as well as a royal psalm.