While the psalms are not organized by topic, it is helpful to compare the dominant themes in each section of the Psalms to the five books of Moses. The first collection of psalms, mainly written by David, is similar to the book of Genesis. Just as Genesis tells how mankind was created, fell into sin, and was then promised redemption, many of these psalms discuss the human condition as one where man is blessed, fallen, and redeemed by God. 

The second collection of psalms, mainly written by David and the sons of Korah, is similar to the book of Exodus. Just as Exodus describes the nation of Israel, many of these psalms describe the nation as ruined and then recovered. As God rescued the nation of Israel, He also rescues us. These Psalms remind us that we do not have to come up with solutions first; instead, we can go to God with our problems and ask Him for help.

Mainly written by Asaph or his descendants, the third collection of psalms is similar to the book of Leviticus. Many of the songs and writings talk about the Temple and God’s enthronement just like Leviticus. They tell us that “because God is almighty, we can turn to Him for deliverance”. These psalms praise God because He is holy, and His perfect holiness deserves our worship and reverence.

Meanwhile, the fourth collection of psalms is similar to the book of Numbers. Most of it is written by unknown authors. Just as Numbers discusses Israel’s relationship with surrounding nations, these psalms often mention the relationship between God’s overruling Kingdom and the other nations. Because we are citizens of the Kingdom of God, we can look at the events and troubles of earth with a different perspective. 

The fifth and final collection of psalms is written mainly by David and has many similarities to the book of Deuteronomy. Just as Deuteronomy was concerned with God and His Word, these psalms are anthems of praise and thanksgiving for God and His Word. Most of the psalms were originally set to music and used in worship. We can use these psalms today as they were used in the past, as a hymnbook of praise and worship. This is a book that ought to make our hearts sing.