Các ý tưởng và ký ức, tức là đại diện tinh thần của những kinh nghiệm trong quá khứ, được triệu tập hình thức preconscious để giúp người điều chỉnh với tình hình đối đầu với anh ta. Khi mối nguy hiểm là trong quá khứ hay nhu cầu được thỏa mãn, tâm chuyển sự chú ý của mình cho các vấn đề khác | 57 world it comes to rest and focuses its attention upon the object or danger. Ideas and memories . mental representations of past experiences are summoned form the preconscious to help the person adjust to the situation confronting him. When the danger is past or the need is satisfied the mind turns its attention to other matters 108 109 . Concerning the nature of the unconscious proper Freud suggested 109 that threatening events could be repressed in memory so that they were not ordinarily available for conscious recall. Freud s analysis of repression the selective inability to recall is a form of Darwinism survival of the fittest as applied to the mental world to become the Freudian suppression of the threatening . Threatening events belong to the set of the unconscious proper events . Freud developed further 108 109 a theory about the fate of the repressed events connecting them partially to dreams Dreams are filled with disguised or symbolic representations of repressed desires. When the disguise becomes too transparent the dreamer usually wakes up. Anxiety dreams and nightmares for example are caused by the emergence of repressed desires which makes the person anxious. He noticed that somatically sleep is an act which reproduces intra-uterine existence 5 fulfilling the condition of repose warmth and absence of stimulus. The feature characterizing the mind of a sleeping person is an almost complete withdrawal from the surrounding world and the cessation of all interest in it. Freud pictured 109 the situation which leads to dream formation as follows the preconscious dream-wish is formed which expresses the unconscious impulse in the material of the preconscious day-residues. This dreamwish must be sharply distinguished from the day-residues it need not have existed in waking life and it may already display the irrational character . a person in the dream is the mixture of two or three rather similar people etc noticeable in all that is unconscious when .