The description of the analysis of the unconscious would be incomplete if a word were not said about the question whether this method is equally applicable to the two types. As a matter of fact, both the development and the conception of the unconscious are different for each type. Although making every effort to find out a formulation that shall be as universally valid as possible, we must emphatically impress upon our minds the fact that the two modes of conception of the types are essentially different; a universal formulation that is just, only becomes possible when both standpoints are given equal consideration. I do not conceal from myself the fact that this subject is of less interest to the layman than to the specialist. Nevertheless, certain aspects of the question are of such a general character that the layman should not find the perusal of this last section entirely without interest.
Let us first consider the concept of the unconscious. I have here introduced the unconscious under the conception of a psychological function, namely, the function of the sum of all those psychic contents which do not reach the threshold of consciousness. I have divided the unconscious materials into personal—that is to reminiscences attributable to personal experiences, combinations and tendencies—and into impersonal collective contents, that is, those whose contents cannot be attributed to personal experiences.
The contents of the psyche are fundamentally images indicating function on the one hand, and upon the other objects and the world generally. The conscious contains the recent object-images; the personal unconscious, the object-images of the individual past, so far as they have either been forgotten or repressed; whilst the absolute or collective unconscious contains the inherited world-images generally, under the form of primordial images or mythical themes. All psychic images have two sides: the one, being directed towards the object, is as faithful a likeness of the object as possible, framed without any intention or obligation to be anything else. The other side is directed towards the soul, that is towards the psychic function and the laws peculiar to it.
Let us take as an example, a primordial image out of a hero-myth. There is in the West a demon ancestress with a large mouth. The hero creeps into it, and at the same moment a certain little bird sings; the ancient dame shuts her mouth with a bang, and the hero disappears.
The side of the image directed towards the physical object means, the sun goes down in the evening into the mouth of the ocean. At this hour a certain little bird sings (which is an objective fact), and the sun disappears into the depths of the sea.
The side of the image directed towards the soul, that is the idea, signifies: The energy contained in consciousness disappears (like the sun in the evening) into the monster of the unconscious.
If we consider the collective-unconscious from the side of the soul or idea, it is something entirely distinct, and it must be differentiated, abstracted from the object, if its contents are to attain the perfection of an idea. If, on the other hand, we consider the collective-unconscious from the side of the physical object, that is as an image of the object, it is weaker and less clear than the object itself, and can only be brought to perfection if it is objectified, that is projected on to the object itself.
As previously explained, there are two types of human psychology that can be clearly distinguished, viz. introversion and extroversion. The introvert is characterised by the thought standpoint; the extrovert by the feeling standpoint. As I showed, they are quite different in their relation to the object: the introvert abstracting from the object and thinking about it, whilst the extrovert goes to the object and feels himself into it. The accent of value lies upon the ego for the introvert, but upon the object for the extrovert. The former's chief concern is the preservation of the ego; that of the latter the preservation of the object. The two types will adopt a different attitude towards the unconscious, namely, the introvert will and must seize the idea-side of the unconscious image; the extrovert, on the other hand, seizing the side of the physical reflection. The introvert will purify as far as possible the idea-side from the "alloy" of the concretistic admixture of the physical image, in order to arrive at the abstract idea; whilst, on the other hand, the extrovert will purify the physical image as far as possible from the "phantastic" admixture of the enveloping ideas. The former, by raising himself to a world of idea, will endeavour to overcome the disturbing influence of the unconscious; whilst the latter will approach the object as near as possible and project the unconscious image into the physical object, thus freeing himself from the grip of the unconscious.
What for the extrovert is a phantastic and disturbing admixture in the unconscious picture, is for the introvert precisely that which has the most value, for it is the germ of the pure idea, and vice versâ; what for the introvert are merely concretistical "imperfections," survivals of a physical origin, are for the extrovert a most valuable hint, the bridge by which the unconscious can be united with the object.