Different ego reactions in the loss of a love object present meaningful aspects such as mourning, melancholia, and the negative therapeutic reaction, and lethargy is a manifestation of this mechansim. The fixation point, according to Cesio, is in the prenatal phase of development. As a consequence, the lost object is the prenatal forerunner of the ego ideal, the most archaic and chaotic repression of the primal scene. Among these archaic forms the author includes incest and matricide. By nothing the importance of lethargy, the analyst can sometimes identify the primitive lost object (the 'lethargic object'). If this element is resolved, the negative therapeutic reaction can be modified.