The book of Psalms is the heart of the Old Testament, the libretto of the most vibrant worship imaginable. It informs our intellect, stimulates our imagination, arouses our emotions and stirs us to holy thoughts and actions. It is also a pivotal witness to, and anticipation of, Jesus Christ. Tremper Longman's commentary interprets each psalm in its Old Testament setting, summarizes its message and reflects on its significance from a New Testament perspective, noting any citation and also providing a Christological reading.