In psychoanalytic theory, the id, ego, and superego are three distinct, interacting agents in the psychic apparatus, outlined in Sigmund Freud's structural model of the psyche. The three agents are theoretical constructs that Freud employed to describe the basic structure of mental life as it was encountered in psychoanalytic practice. Freud himself used the German terms das Es, Ich, and Über-Ich, which literally translate as "the it", "I", and "over-I". The Latin terms id, ego and superego were chosen by his original translators and have remained in use. The structural model was introduced in Freud's essay Beyond the Pleasure Principle (1920) and further refined and formalised in later essays such as The Ego and the Id (1923). Freud developed the model in response to the perceived ambiguity of the terms "conscious" and "unconscious" in his earlier topographical model. Broadly speaking, the id is the organism's unconscious array of uncoordinated instinctual needs, impulses and desires; the superego is the part of the psyche that has internalised social rules and norms, largely in response to parental demands and prohibitions in childhood; the ego is the integrative agent that directs activity based on mediation between the id's energies, the demands of external reality, and the moral and critical constraints of the superego. Freud compared the ego, in its relation to the id, to a man on horseback: the rider must harness and direct the superior energy of his mount, and at times allow for a practicable satisfaction of its urges. The ego is thus "in the habit of transforming the id's will into action, as if it were its own."
History and translation of the terms The terms "id", "ego", and "superego" are not Freud's own; they are Latinisations by his translator James Strachey. Freud himself wrote of "das Es", "das Ich", and "das Über-Ich"—respectively, "the It", "the I", and "the Over-I". Thus, to the German reader, Freud's original terms are to some degree self-explanatory. The term "das Es" was originally used by Georg Groddeck, a physician whose unconventional ideas were of interest to Freud (Groddeck's translators render the term in English as "the It"). The word ego is taken directly from Latin, where it is the nominative of the first person singular personal pronoun and is translated as "I myself" to express emphasis. Figures like Bruno Bettelheim have criticised the way "the English translations impeded students' efforts to gain a true understanding of Freud" by substituting the formalised language of the elaborated code for the quotidian immediacy of Freud's own language.
Id Freud conceived of the id as the unconscious source of bodily needs, impulses and desires, especially those related to aggression and the sexual drive. The id acts according to the pleasure principle—the psychic force oriented to the immediate gratification of impulse and desire. Freud described the id as "the dark, inaccessible part of our personality". Understanding of it is limited to analysis of dreams and neurotic symptoms, and it can only be described in terms of its contrast with the ego. It has no organisation and no collective will: it is concerned only with the satisfaction of drives in accordance with the pleasure principle. It is oblivious to reason and the presumptions of ordinary conscious life: "contrary impulses exist side by side, without cancelling each other. . . There is nothing in the id that could be compared with negation. . . nothing in the id which corresponds to the idea of time." The id "knows no judgements of value: no good and evil, no morality. ...Instinctual cathexes seeking discharge—that, in our view, is all there is in the id." Developmentally, the id precedes the ego. The id consists of the basic instinctual drives that are present at birth, inherent in the somatic organisation, and governed only by the pleasure principle. The psychic apparatus begins as an undifferentiated id, part of which then develops into a structured "ego", a concept of self as an integrated unity that takes the principle of reality into account. Freud describes the id as "the great reservoir of libido", the energy of desire, usually conceived as sexual in nature, the life instincts that are constantly seeking a renewal of life. He later also postulated a death drive, which seeks "to lead organic life back into the inanimate state." For Freud, "the death instinct would thus seem to express itself—though probably only in part—as an instinct of destruction directed against the external world and other organisms" through aggression. Since the id includes all instinctual impulses, the destructive instinct, as well as eros or the life instincts, is considered to be part of the id.
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![Id, ego and superego: Freud's structural or three instance model, referring to his rider parable: The human head symbolises the ego, the animal the id. Dualistic in an analogue way, the libidinal energy branches out from the id into two main areas: up the mental urge to know and down the bodily urge to act. Both are bundled into actions in the ego in order to fulfil the id's needs. This includes perception and judgement of inner and outer reality, leading to experiences (by muscle control), which the superego internalises via neuronal imprinting. The superego contains the socialisation that takes place during childhood. If it complements the id's instincts, the organism remains mentally healthy – the 'rider' carries out the will of his 'animal' "as if it were his own."[38] The borders between un- and consciousness aren't sharp: "Where id was, ego shall become."[39]](https://upload.wikimedia.org/wikipedia/commons/thumb/8/88/Freuds_structural_model_of_psyche.png/1280px-Freuds_structural_model_of_psyche.png?utm_source=en.wikipedia.org&utm_campaign=parser&utm_content=thumbnail)


