Note 9 — Chapter X
Mary C. Wadsworth translation
In scientific terms one can say: Consciousness is everywhere; it is awake when and wherever the bodily energy underlying the spiritual, the so-called psychophysical, exceeds that degree of strength which we call the threshold. (Compare p. 80, note.) According to this, consciousness can be localized in time and space. The highest point of our psychophysical activity wavers, as it were, from one place to another, wherewith the light of consciousness changes its place, only that during this life it fluctuates back and forth within our body simply, indeed, within a limited part of this body, and in sleep sinks quite below the threshold, above which, on waking, it rises again.
(Compare on this point. “Elemente der Psychophysik,” II. Kap. 40 und 41.)