there are two kinds of unconscious, which, we do not as yet find distinguished by the psychologists. Both are unconscious in the psychological sense; but in our sense the first, which we call Unc., is likewise incapable of consciousness, whereas the second we term "Forec." because its emotions, after the observance of certain rules, can reach consciousness, perhaps not before they have again undergone censorship, but still regardless of the Unc. system. The fact that in order to attain consciousness the emotions must traverse an unalterable series of events or succession of instances, as is betrayed through their alteration by the censor, has helped us to draw a comparison from spatiality. We described the relations of the two systems to each other and to consciousness by saying that the system Forec. is like a screen between the system Unc. and consciousness. The system Forec. not only bars access to consciousness, but also controls the entrance to voluntary motility and is capable of sending out a sum of mobile energy, a portion of which is familiar to us as attention.
We must also steer clear of the distinctions superconscious and subconscious which have found so much favour in the more recent literature on the psychoneuroses, for just such a distinction seems to emphasize the equivalence of the psychic and the conscious.
What part now remains in our description of the once all-powerful and all-overshadowing consciousness? None other than that of a sensory organ for the perception of psychic qualities. According to the fundamental idea of schematic undertaking we can conceive the conscious perception only as the particular activity of an independent system for which the abbreviated designation "Cons." commends itself. This system we conceive to be similar in its mechanical characteristics to the perception system P, hence excitable by qualities and incapable of retaining the trace of changes, i.e. it is devoid of memory. The psychic apparatus which, with the sensory organs of the P-systems, is turned to the outer world, is itself the outer world for the sensory organ of Cons.; the teleological justification of which rests on this relationship. We are here once more confronted with the principle of the succession of instances which seems to dominate the structure of the apparatus. The material under excitement flows to the Cons.
