Sigmund Freud was a renowned Austrian neurologist and psychoanalyst who is considered to be the father of psychoanalysis. His main concerns were the ego, id, and superego. The ego is the part of the psyche that mediates between the conscious and unconscious mind, while the id is the part of the psyche that is driven by instinct and pleasure. The superego is the part of the psyche that is responsible for morality and conscience. Freud believed that these three components of the psyche interact with each other in order to create a healthy personality.