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CHAPTER IV

WHAT follows now is speculation, speculation often far-fetched, which each will according to his particular attitude acknowledge or neglect. Or one may call it the exploitation of an idea out of curiosity to see whither it will lead.
Psycho-analytic speculation starts from the impression gained on investigating unconscious processes that consciousness cannot be the most general characteristic of psychic processes, but merely a special function of them. Metapsychologically expressed, it asserts that consciousness is the functioning of a particular system which may be called Bw. Since consciousness essentially yields perceptions of excitations coming from without and feelings (Empfindungen) of pleasure and ‘pain' which can only be derived from within the psychic apparatus, we may allot the system W-Bw. 1 ( = perceptual consciousness) a position in space. It must lie on the boundary between outer and inner, must face towards the outer world, and must envelop the other psychic systems.