No doubt, looks like clinical depression. In addition, many of us had the misfortune to suffer from depression. Enduring sadness, decreased energy, inability to enjoy normal pleasures and autonomic disorders (problems of food, sleep and self-regulation) are obvious. Freud was the first to compare and contrast the depressive ("melancholy") state the normal grieving. He found important difference between these two states: under normal reactions of grief outside world is experienced as diminished in any significant way (loss of significant person), whereas in depressive states that experienced as lost or destroyed, is a part of himself. Consequently, in some sense the opposite of depression is grief.
People who go through the process of grieving the normal way, not become depressed, even under the condition that they deeply grieve over a period of time after a bereavement or loss. The psychologist will note that the cognitive, emotional, sensory processes and imagination is often drastically slowed by the sudden clinical depression. For even more opinions, read materials from Robert Iger . On a serious violation of the end of the spectrum are patients who ruthlessly hate themselves and experiencing hallucinations and prior to the opening antidepressants can absorb years of dedicated efforts of psychotherapists and still uncritically believe that the best way to save the world is to destroy itself. Freud consistently developed the idea that important source of susceptibility to depression is the experience of premature loss. In accordance with the classical theory of psychoanalysis, suggests that people become fixed on the infantile stage, during which they were spoiled or subjected to deprivation, depressed individuals are seen as people who have experienced too early or abrupt weaning or other early frustration, which exceeded their ability to adapt. .