"On the other side of the pleasure principle" is a collection of scientific works that were published in the 20s and 30s of the 20th century and are devoted to the consideration of the concepts of "conscious" and "unconscious". His conclusion regarding the presence of an unconscious desire for death, which was based on the analysis of the behavior of veterans and invalids of the First World War, is still relevant today for the therapy of traumatic neuroses and is a way to understand the nature of the neurosis of obsessive states, melancholia and depression.< p>In his work "I and It", Z. Freud reveals the essence of the classical model of the psyche for psychoanalysis, the components of which are the It - the unconscious, the I - the conscious, or the Ego and the Superconscious - the Super-Ego, or the Censor and their interaction.In the article "The Future of One Illusion" - one of the late works of the scientist - from the point of view of psychoanalysis, the influence of moral factors on relations within society and the causes of the emergence of religious beliefs are considered.