Freud's psychoanalytic theories
The role of the mind is something that Freud repeatedly talks about because he believes that the mind is responsible for both conscious and unconscious decisions based on drives and forces. Unconscious desires motivate people to act accordingly.  The id, ego, and superego are three aspects of the mind, which Freud believes, makes up a person’s personality.  “We are simply actors in the drama of our minds, pushed by desire, pulled by coincidence.  Underneath the surface, our personalities represent the power struggle going on deep within us” (Cash, Psychology for Dummies).