Biblical scholar Walter Brueggemann has a useful three-category schema for understanding the Psalms. First, psalms of orientation describe the status quo, a place where everything makes sense in our lives. Second, psalms of disorientation describe a painful upheaval, a threat to our happiness and well-ordered existence. Finally, psalms of reorientation describe a place of renewed order, where God has rescued us from disorientation and revitalized our world. These broad categories give us a tool for understanding the Psalms.