Freud postulated three levels of mind: the conscious mind, the preconscious mind, and the unconscious mind. He felt that our conscious mind only accounted for a small portion of the totality of the self, and the vast unconscious mind accounted for the rest (Bethel, 2004).
Freud believed that much of the unconscious content that affects humans is made up of inherited primal fantasies based on phylogenic experiences, that is fantasies that are species based, not individual based. Freud's main interests lay in understanding how personal experience shaped and formed the unconscious mind. It was his assertion that this formative pressure occurred through a process known as repression. Freud's "hedonic hypothesis" stipulated that people seek pleasure and avoid pain. It was also Freud who initiated the concepts of the id, ego, and the super-ego (Bethel, 2004).
The id is primarily concerned with biological drives and survival and is nearly always unconscious. It operates by the pleasure principle and is hedonistic, that is, it seeks to satisfy urges and reduce tensions. Freud theorized that the id is the structure of the mind that is responsible for the psychic sexual energy known as libido (Bethel, 2004).
The ego is the structure of the personality that brings about a sense of unity of person. ...