Compiled Explorer Tape Transcripts (Book) - from Robert Monroe

EXPLORER 7 66 what you call the earthbound spinits, and those, also, who have been called ghosts. These are merely souls who have been so locked into, or have allowed these emotional or mental thought-forms to become their existence; to be what they are. They allow this to become their reality. Therefore, these souls are locked into this state of reality, which is their state of reality at the time. It is a level of consciousness. They are locked here until more truth is revealed, until some aspect outside of their level of consciousness can help them to at least see and to be released into another state. This is why there are many things taking place within the human levels of existence. All experiences are most important. But one of the most important is for the soul to continually be in tune with his own nature, and to release all or most of the emotional and mental thought-forms that can be binding factors that keep the soul from allowing the true energy to experience its own true nature.

ENERGY-BEING: It is very important for humans to sleep because of the whole nature of the Earth level, and the time realm. There is a magnificent creation of rhythm, a complete rhythm of the soul and the self. With each heart beat... the very throbb and beat of human existence is a rhythmic process. And the sleep state is a part of this rhythmic process. It has been created in Man's nature, because Man, in his waking state, is often not in touch with himself.