The book I chose to study in preparation for the Psalms (Just one of the five Wisdom Books) is "Praying the Psalms" by Walter Brueggemann. I chose the book mostly because it was short and appeared to be both scholarly and practical, which is the thrust of our e4 program. I should also point out that in my first e4 session I railed against Brueggemann's awful exegesis of the book of Luke, so coming back to him is a work of redemption.
His book hasn't particularly blown me away, but I just finished the second chapter, "The Liberation of Language." I appreciate the distinction he makes between language that describes things as they are and language that creates new spaces. The Psalms fall into the latter category. These poems and prayers do not describe the world as it is. Rather, they create a space of communion between hurting people and a healing God, or between celebrative people and an overjoyed Lord. They are not the language of, to use my own experience, computer engineering. They are the language of theatre.
Psalms are words which occupy a space for which there are no words. They create a bond between creature and Creator. They give breath to both inexpressible grief and joy. In the Psalms we find a depth of true expression that we did not know existed, or did not think we had permission to speak. The Psalms set our hearts free to speak to God as sons and daughters, with all the familiarity of in-the-family language. They are the inside-jokes, so to speak, of God's household. They are our special language to him--a personal prayer language for God's children.
They are also prayers that we can offer on behalf of others. I am not always writhing in the agony of Psalm 22, but more often than not, I know someone who is. These are our prayers for ourselves and for each other. May it be so in me.