breakthroughs in physics, the discovery of LSD and subsequent psychedelic research opened up new revolutionary avenues in the study of human consciousness. The 1950s and 1960s saw a major explosion of interest in Eastern spiritual philosophies and practices, shamanism, mysticism, experiential psychotherapies, and other deep explorations of the human psyche. The study of death and dying brought some extraordinary data about the relationships between consciousness and the brain. In addition, there was a resurgence of interest in parapsychology, particularly around the research of extrasensory perception (ESP). New information about the human psyche was also being generated by laboratories experimenting with modern mindaltering techniques, such as sensory deprivation and biofeedback.
The common denominator of all this research was its focus on non-ordinary states of consciousness, an area that in the past had been grossly neglected not just by traditional science, but by the entire Western culture. In our emphasis on rationality and logic, we have put great value on the everyday sober state of mind and relegated all other states of consciousness into the realm of useless pathology.
In this respect, we have a very unique position in human history. All the ancient and pre-industrial cultures have held non-ordinary states of consciousness in high esteem. They valued them as powerful means for connecting with sacred realities, nature, and each other, and they used these states for identifying diseases and healing. Altered states were also seen as important sources of artistic inspiration and a gateway to intuition and extrasensory perception. All other cultures have spent considerable time and energy developing various mind-altering techniques and have used them regularly in a variety of ritual contexts.
Michael Harner, a well-known anthropologist who also underwent a shamanic initiation in South America, pointed out that from a cross-cultural perspective, the traditional Western understanding of the human psyche is significantly flawed. It is ethnocentric in the sense that Western scientists view their own particular approach to reality and psychological phenomena as superior and "proven beyond a shadow of doubt," while judging the perspectives of other cultures as inferior, naive, and primitive. Second, the traditional academic approach is also what Harner calls "cogni-centric," meaning that it takes into consideration only those observations and experiences that are mediated by the five senses in an ordinary state of consciousness.
The main focus of this book is to describe and explore the radical changes in our understanding of consciousness, the human psyche, and the nature of reality itself that become necessary when we pay attention to the testimony of non-ordinary states, as all other cultures before us. For this purpose, it does not make much difference whether the trigger of these states is the practice of meditation, a session in experiential psychotherapy, an episode of spontaneous psychospiritual crisis ("spiritual emergency"), a near-death situation, or ingestion of a psychedelic substance. Although these techniques and experiences may vary in some specific characteristics, they all represent different gateways into the deep territories of the human psyche, areas uncharted by traditional psychology. The thanatologist Kenneth Ring acknowledged this fact by coining for them the collective term Omega experiences.
Since we are interested here in exploring the most general implications of modern consciousness research for our understanding of ourselves and the universe, the examples that I use in this book are drawn from a variety of situations. Some come from sessions with Holotropic Breathwork™ or from psychedelic therapy, others from shamanic rituals, hypnotic regression, near-death situations, or spontaneous episodes of spiritual emergency. What they all have in common is that they represent a