With this we affirm the important fact that man in his phantastic thinking has kept a condensation of the psychic history of his development. An extraordinarily important task, which even to-day is hardly possible, is to give a systematic description of phantastic thinking. One may, at the most, sketch it. While directed thinking is a phenomenon conscious throughout,[49] the same cannot be asserted of phantastic thinking. Doubtless, a great part of it still falls entirely in the realm of the conscious, but, at least, just as much goes along in half shadows, and generally an undetermined amount in the unconscious; and this can, therefore, be disclosed only indirectly.[50] By means of phantastic thinking, directed thinking is connected with the oldest foundations of the human mind, which have been for a long time beneath the threshold of the consciousness. The products of this phantastic thinking arising directly from the consciousness are, first, waking dreams, or day-dreams, to which Freud, Flournoy, Pick and others have given special attention; then the dreams which offer to the consciousness, at first, a mysterious exterior, and win meaning only through the indirectly inferred unconscious contents. Lastly, there is a so-called wholly unconscious phantasy system in the split-off complex, which exhibits a pronounced tendency towards the production of a dissociated personality.[51] Our foregoing explanations show wherein the products arising from the unconscious are related to the mythical. From all these signs it may be concluded that the soul possesses in some degree historical strata, the oldest stratum of which would correspond to the unconscious. The result of that must be that an introversion occurring in later life, according to the Freudian teaching, seizes upon regressive infantile reminiscences taken from the individual past. That first points out the way; then, with stronger introversion and regression (strong repressions, introversion psychoses), there come to light pronounced traits of an archaic mental kind which, under certain circumstances, might go as far as the re-echo of a once manifest, archaic mental product.