Psychoanalytic essay "I and It" is sanctified to one of the most mysterious areas of human psyche - to co-operation conscious and unconscious. Freud exposes acute mechanisms, by means of that "It" personifying the deep level of unconscious appetences manages our conscious "Я", creating an illusion here, as though "Я" makes decision independently. In collection also entered work "On other side principle of pleasure", in that an author disserts upon the paradoxical "appetence to death", stopped up in every living creature, and essay "Moses and monotheism".