All human behavior is motivated ultimately by the prime psychic force, libido.
Because of the powerful social taboos attached to sexual impulses, many of our desires and memories are repressed.
Id is completely unconscious part of our psyche that serves as a storehouse of our desires, wishes, and fears. The id houses the libido, the source of psychosexual energy.
Superego is often thought of as one's "conscience"; the superego operates "like an internal censor [encouraging] moral judgements in the light of social pressure.
Ego is mostly partially conscious part of the psyche that processes experiences and operates as a referee or mediator between the id and superego
The unconscious is the irrational part of the psyche unavailable to a person's consciousness except through dissociated acts or dreams
