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ID
nature: represent biological aspect
level: unconscious
principle: pleasure
purpose: seek pleasure and avoid pain
aim: immediate gratification
ego
nature: represent psychological aspect
level: conscious, preconscious and unconscious
principle: reality
purpose: adapt to reality while controlling the id and superego
aim: safety, compromise and delayed gratification
superego
nature: represent societal and parental aspect
level: conscious, preconscious and unconscious
principle: moralistic and idealistic
purpose: represent right and wrong
aim: perfection
freud’s psychodynamic theory
id, ego, superego