Hidden personality is the part of the personality that is determined by unconscious processes. Sigmund Freud The basic assumption of Freud's psychoanalytic view of the person is an energy system in which all mental processes are considered to be energy flows, which can flow freely or can get sidetracked or dammed up. Freud argues that the goal of all behaviour is the reduction of tension through the release of energy, which produces pleasure. People function in accordance with hedonistic principles, seeking unbridled gratification of all desires. The endless pursuit of pleasure is, however, in conflict with society and civilization, as the uncontrolled satisfaction of pleasure is not accepted. In Freud's view, humans are primarily driven by sexual and aggressive instincts. Sexual and aggressive energy prevented from expression in a more direct way are converted to cultural activities such as art and science. Energy used for cultural purposes is, however, no longer available to sexual purposes and Freud concludes that the price of civilization is misery, the forfeit of happiness and a sense of guilt. Freud's theory of personality is based on the idea that much of human behaviour is determined by forces outside awareness. The relation between the person and society is controlled by primitive urges buried deep within ourselves, forming the basis of the hidden self. Freud argues that much of our psychic energy is devoted either to finding acceptable expressions of unconscious ideas or to keeping them unconscious. Freud constructed his concept of the unconscious from analysis of slips of the tongue, dreams, neuroses, psychoses, works of art and rituals. In psychoanalytic theory, mental life is divided into three levels of awareness. The largest portion of the mind is formed by the unconscious system and only a very small part by the conscious. The preconscious-system stands like a partition screen between the unconscious-system and consciousness. The conscious mind is like the tip of an iceberg, with its greatest part – the unconscious – submerged. Psychoanalytic theory is fundamentally a motivational theory of human behaviour and Freud claimed that "psychoanalysis aims at and achieves nothing more than the discovery of the unconscious in mental life". Carl Rogers Humanist psychologist Carl Rogers opposed psychoanalytic personality theory as he was dissatisfied with the 'dehumanising nature' of this school of thought. The central tenet of humanistic psychology is that people have drives that lead them to engage in activities resulting in personal