The commentary on Psalm 1 explores the dual paths of the blessed and the wicked, highlighting the importance of choices in attaining happiness and righteousness. It emphasizes the idea that true blessedness comes from avoiding the counsel of the ungodly and signifies that the blessed man separates himself from sinful influences. Various theologians contribute insights on the psalm's role as an introduction to the Psalter, portraying it as a foundational guide for Christian living.