A point may be reached at rare infrequent intervals where he retreats so far inwards from the body's senses that he is wholly severed from them. If this happens he will of course be wholly severed from the physical world, too. This throws the body into a condition closely resembling sleep, from the point of view of an outside observer, yet it will not be sleep as men ordinarily know it. It will either be more graphic and more vivid than the most memorable of all his dreams or else it will be entirely without visual incident or pictorial scene. In the first case, it will be perfectly rational and highly instructive yet unique, strange, mystical. In the second case, it will be conscious awareness of the Overself alone, with no personal self for It to inspire.
-- Notebooks Category 22: Inspiration and the Overself > Chapter 6: Experiencing a Glimpse > # 270