Id, ego and super-ego are the three parts of the psychic apparatus defined in Sigmund Freud's structural model of the psyche; they are the three theoretical constructs in terms of whose activity and interaction mental life is described. According to this model of the psyche, the id is the set of uncoordinated instinctual trends; the ego is the organized, realistic part; and the super-ego plays the critical and moralizing role


The id comprises the unorganized part of the personality structure that contains the basic drives. The id acts according to the "pleasure principle", seeking to avoid pain or displeasure aroused by increases in instinctual tension.

The id is unconscious by definition:

"It is the dark, inaccessible part of our personality, what little we know of it we have learned from our study of the dream-work and of the construction of neurotic symptoms, and most of that is of a negative character and can be described only as a contrast to the ego. We approach the id with analogies: we call it a chaos, a cauldron full of seething excitations... It is filled with energy reaching it from the instincts, but it has no organization, produces no collective will, but only a striving to bring about the satisfaction of the instinctual needs subject to the observance of the pleasure principle."
The id is responsible for our basic drives, "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."It is regarded as "the great reservoir of libido",[8] the instinctive drive to create — the life instincts that are crucial to pleasurable survival. Alongside the life instincts came the death instincts — the death drive which Freud articulated relatively late in his career in "the hypothesis of a death instinct, the task of which is 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. Freud considered that "the id, the whole person...originally includes all the instinctual impulses...the destructive instinct as well."as Eros or the life instincts.


The ego acts according to the reality principle; i.e. it seeks to please the id’s drive in realistic ways that will benefit in the long term rather than bringing grief.[12] At the same time, Freud concedes that as the ego "attempts to mediate between id and reality, it is often obliged to cloak the Ucs. [Unconscious] commands of the id with its own Pcs. [Preconscious] rationalizations, to conceal the id's conflicts with reality, to profess...to be taking notice of reality even when the id has remained rigid and unyielding."[13]

The ego comprises that organised part of the personality structure that includes defensive, perceptual, intellectual-cognitive, and executive functions. Conscious awareness resides in the ego, although not all of the operations of the ego are conscious. Originally, Freud used the word ego to mean a sense of self, but later revised it to mean a set of psychic functions such as judgment, tolerance, reality testing, control, planning, defence, synthesis of information, intellectual functioning, and memory.The ego separates out what is real. It helps us to organise our thoughts and make sense of them and the world around us."The ego is that part of the id which has been modified by the direct influence of the external world ... The ego represents what may be called reason and common sense, in contrast to the id, which contains the passions ... in its relation to the id it is like a man on horseback, who has to hold in check the superior strength of the horse; with this difference, that the rider tries to do so with his own strength, while the ego uses borrowed forces."Still worse, "it serves three severe masters...the external world, the super-ego and the id." Its task is to find a balance between primitive drives and reality while satisfying the id and super-ego. Its main concern is with the individual's safety and allows some of the id's desires to be expressed, but only when consequences of these actions are marginal. "Thus the ego, driven by the id, confined by the super-ego, repulsed by reality, struggles...[in] bringing about harmony among the forces and influences working in and upon it," and readily "breaks out in anxiety — realistic anxiety regarding the external world, moral anxiety regarding the super-ego, and neurotic anxiety regarding the strength of the passions in the id." It has to do its best to suit all three, thus is constantly feeling hemmed by the danger of causing discontent on two other sides. It is said, however, that the ego seems to be more loyal to the id, preferring to gloss over the finer details of reality to minimize conflicts while pretending to have a regard for reality. But the super-ego is constantly watching every one of the ego's moves and punishes it with feelings of guilt, anxiety, and inferiority.

To overcome this the ego employs defense mechanisms. The defense mechanisms are not done so directly or consciously. They lessen the tension by covering up our impulses that are threatening. Ego defense mechanisms are often used by the ego when id behavior conflicts with reality and either society's morals, norms, and taboos or the individual's expectations as a result of the internalisation of these morals, norms, and their taboos.


Freud developed his concept of the super-ego from an earlier combination of the ego ideal and the "special psychical agency which performs the task of seeing that narcissistic satisfaction from the ego ideal is ensured...what we call our 'conscience'." For him "the installation of the super-ego can be described as a successful instance of identification with the parental agency," while as development proceeds "the super-ego also takes on the influence of those who have stepped into the place of parents — educators, teachers, people chosen as ideal models."

The super-ego aims for perfection. It comprises that organised part of the personality structure, mainly but not entirely unconscious, that includes the individual's ego ideals, spiritual goals, and the psychic agency (commonly called "conscience") that criticises and prohibits his or her drives, fantasies, feelings, and actions. "The Super-ego can be thought of as a type of conscience that punishes misbehavior with feelings of guilt. For example, for having extra-marital affairs."

The super-ego works in contradiction to the id. The super-ego strives to act in a socially appropriate manner, whereas the id just wants instant self-gratification. The super-ego controls our sense of right and wrong and guilt. It helps us fit into society by getting us to act in socially acceptable ways.
The super-ego's demands often oppose the id’s, so the ego sometimes has a hard time in reconciling the two.

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