The composition of the fourth book is in no way inferior to that of the other four books already analysed. Its three major sections, each containing five psalms, are organised in a concentric fashion; they are linked by two short sections which constitute the focal points of the ellipse that the whole book draws. The extreme sections are related. The first section (Ps 90-94) describes "the fate of the children of Adam", the last one (Ps 102-106) "the...