Here's another excerpt from Michael Talbot's fascinating book The Holographic Universe. I continue to recommend this book.

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...Other experiences included the accessing of racial and collective memories. Individuals of Slavic origin experienced what it was like to participate in the conquests of Genghis Khan's Mongolian hordes, to dance in trance with the Kalahari bushmen, to undergo the initiation rites of the Australian aborigines, and to die as sacrificial victims of the Aztecs. And again the descriptions frequently contained obscure historical facts and a degree of knowledge that was often completely at odds with the patient's education, race, and previous exposure to the subject. For instance, one uneducated patient gave a richly detailed account of the techniques involved in the Egyptian practice of embalming and mummification, including the form and meaning of various amulets and sepulchral boxes, a list of the materials used in the fixing of the mummy cloth, the size and shape of the mummy bandages, and other esoteric facets of Egyptian funeral services. Other individuals tuned into the cultures of the Far East and not only gave impressive descriptions of what it was like to have a Japanese, Chinese, or Tibetan psyche, but also related various Taoist or Buddhist teachings.

In fact, there did not seem to be any limit to what Grof's LSD subjects could tap into. They seemed capable of knowing what it was like to be every animal, and even plant, on the tree of evolution. They could experience what it was like to be a blood cell, an atom, a thermonuclear process inside the sun, the consciousness of the entire planet, and even the consciousness of the entire cosmos. More than that, they displayed the ability to transcend space and time, and occasionally they related uncannily accurate precognitive information. In an even stranger vein they sometimes encountered nonhuman intelligences during their cerebral travels, discarnate beings, spirit guides from "higher planes of consciousness," and other suprahuman entities...

Perhaps Grof's most remarkable discovery is that the same phenomena reported by individuals who have taken LSD can also be experienced without resorting to drugs of any kind...The Grofs call their technique holotropic therapy and use only rapid and controlled breathing, evocative music, and massage and body work, to induce altered states of consciousness. To date, thousands of individuals have attended their workshops and report experiences that are every bit as spectacular and emotionally profound as those described by subjects of Grof's previous work on LSD...   more »

Entheogen: Awakening the Divine Within is a feature length documentary which invites the viewer to rediscover an enchanted cosmos in the modern world by awakening to the divine within. The film examines the re-emergence of archaic techniques of ecstasy in the modern world by weaving a synthesis of ecological and evolutionary awareness, electronic dance culture, and the current pharmacological re-evaluation of entheogenic compounds.

Within a narrative framework that imagines consciousness itself to be evolving, Entheogen documents the emergence of techno-shamanism in the post-modern world that frames the following questions: How can a renewal of ancient initiatory rites of passage alleviate our ecological crisis? What do trance dancing and festivals celebrating unbridled artistic expression speak to in our collective psyche? How do we re-invent ourselves in a disenchanted world from which God has long ago withdrawn? Entheogen invites the viewer to consider that the answers to these questions lie within the consciousness of each and every human being, and are accessible if only we give ourselves permission to awaken to the divine within. ...   more »