A 17th century Cambridge librarian locked himself in his study with a manuscript that claimed the human soul could leave the body, travel to distant cities, and return with verifiable information. He tested it. He failed. Then he changed the method, and what he found forced him to rewrite what he thought death was. The astral body is a subtle, non-physical counterpart of the flesh body, described across dozens of traditions as the vehicle of consciousness during sleep, trance, and death. The oldest surviving manuals on how to separate it from the physical body date to the 3rd century CE.
A century and a half after that Cambridge experiment, a French doctor named Hector Durville published his own findings after watching subjects send their astral bodies across Paris and describe rooms they had never entered. The French Society for Psychical Research declared the phenomenon real. Then they argued about what to call it.
We keep a shelf for these books in this reference library. Not because we believe every claim printed in them. Because the people who wrote them believed enough to test, and their tests shaped how we think about consciousness, death, and the boundary between.
What Exactly Is the Astral Body?
The astral body goes by many names, but the structure is consistent across sources. It is a second body, made of finer matter than flesh and bone. It is attached to the physical body by a “silver cord” described in Ecclesiastes 12:6 and later in 19th century occult manuals. It can move independently during sleep, trance, and the approach of death. It is not the soul. It is what the soul rides.
The term “astral body” itself comes from the Greek word astron (star). The Neoplatonists believed this subtle body was made of the same substance as the celestial spheres, hence the name. Plotinus, writing in the 3rd century CE, described it as the vehicle (ochema) of the soul, a luminous envelope that survives the death of the physical body but eventually dissolves.
The distinction matters. The soul is eternal in most traditions. The astral body is not. It is a temporary vessel, worn for a lifetime and then shed. The Tibetan Bardo Thodol (the so-called Tibetan Book of the Dead) describes the consciousness-principle traveling through the intermediate state in a subtle body of habits and desires. The Egyptian Book of the Dead gives the deceased a ka and a ba, two forms of soul-body that travel through the underworld. The Greek Phaedo has Socrates describing the soul weighed down by the corporeal, longing to be free.
These are not metaphors. These are instructions.
Where Does the Concept of the Astral Body Come From?
The oldest clear description comes from the Hermetic corpus, specifically the Poimandres (circa 100–300 CE). In it, the narrator sees his “bodily senses” held back while his “intellectual vision” rises through the spheres. The text describes how the soul descends through the planetary spheres, accumulating a layer of energy from each sphere. That layered body is the astral body.
Plotinus systematized this in the Enneads (circa 250 CE). He wrote that the soul does not descend into the body directly. It descends first into a radiant vehicle, then into the physical body. That vehicle receives impressions from the physical world and transmits them upward. For Plotinus, this explained how emotions like fear and desire could affect the soul without the soul itself being corrupted. The astral body absorbed the damage.
In the 12th century, Jewish mystics of the Provencal and Geronese schools developed the concept of the tzlem (the astral double). Rabbi Isaac the Blind wrote of a subtle form that remains in the supernal worlds while the physical body walks the earth. The Zohar describes how King David’s astral double was visible to prophets, which is how they knew he was still alive during his periods of divine withdrawal.
The academic rediscovery happened in 1875. Madame Blavatsky published Isis Unveiled, which synthesized Hermetic, Neoplatonic, Buddhist and Hindu sources into a single framework. She called the astral body the linga sharira, borrowing from the Samkhya school of Hindu philosophy. Her sources were a mix of direct translation and imaginative reconstruction, but the book triggered a wave of experimental work.
That work led directly to the founding of the Society for Psychical Research in 1882. Its members, including Frederic Myers and William James, conducted thousands of case studies on spontaneous out-of-body experiences. They collected accounts of people who, during illness or near-death, floated above their bodies and described details they could not have seen normally.
How Did Later Traditions Refine the Astral Body?
The Theosophical Society, founded by Blavatsky in 1875, gave the astral body its most detailed taxonomy. They distinguished between the physical body, the etheric double, the astral body, the mental body, and the causal body. The astral body was the seat of emotion and desire, the vehicle that allows consciousness to move through the astral plane.
Annie Besant and Charles Leadbeater wrote the most influential manuals: The Astral Plane (1895) and Man Visible and Invisible (1902). Leadbeater claimed to see the astral body of living people as a colored aura that shifted with mood and thought. He published diagrams showing the shapes and colors of the astral body at each level of spiritual development. Critics pointed out that his descriptions overlapped suspiciously with medieval accounts of the rainbow body in Tibetan Buddhism.
The Golden Dawn, founded in 1888, made astral projection a central practice. Israel Regardie, who joined the Order in the 1930s and later published its secret rituals, described the astral body as the “body of light” used in the Middle Pillar exercise. The practitioner visualizes light descending through the body and building a luminous shell. That shell becomes the vehicle for ritual work, for traveling to the sephiroth on the Tree of Life, for performing magic at a distance.
The practice is not theory. The practice is systematic. The Golden Dawn taught that one must learn to feel the weight and shape of the astral body before attempting to move it. They used a technique called “tactile visualization” where the practitioner runs their awareness through their own limbs and then builds the astral version beside them.
What Are the Essential Primary Texts?
We organize our reading list into three tiers: primary sources (the originals), second-wave synthesis (the 19th and 20th century systematizers), and experimental reports (the people who actually tried). For definitions of key terms, see the glossary entry on the astral plane.
Primary Sources
The Poimandres (100–300 CE). The first Hermetic tractate. Read it for the ascent narrative, where the soul strips off the layers of the spheres. This is the template for every later astral journey.
Plotinus, Enneads IV.3–4 (250 CE). The most detailed ancient treatment of the soul’s vehicle. He calls it the pneuma ochema (spirit vehicle). He argues that the vehicle is formed from the residues of the soul’s descent and that it carries the individual’s character.
The Tibetan Book of the Dead (8th century CE, discovered 14th century). The full title is Bardo Thodol: Liberation Through Hearing During the Intermediate State. It describes what the subtle body experiences between death and rebirth: the clear light of reality, the peaceful deities, the wrathful deities, and the six realms of rebirth. It is not a book you read. It is a book you recite over the dying.
The Zohar (13th century CE). Sections on the tzlem (the luminous image) appear in the portions of Terumah and Vayakhel. The Zohar says the tzlem is what ascends during sleep and gives accounts to the divine presence.
Second-Wave Synthesis
Helena Blavatsky, The Secret Doctrine (1888). Volumes one and two contain her reconstructed cosmology of the astral plane. Her sources are unreliable but her framework is influential. She normalized the idea of the astral body as a universal concept, not a sectarian one.
Annie Besant, The Astral Plane (1895). A systematic description of the astral world: its scenery, its inhabitants, its dangers. She wrote it for people who had never left their bodies. The book is readable, confident, and occasionally breathtaking in its strangeness.
Charles Leadbeater, Man Visible and Invisible (1902). The color plates alone are worth the price. Leadbeater claimed to see the astral body as an egg-shaped luminous field around the physical body, and he painted what he saw. The levels are: physical, etheric, astral, mental, causal, buddhic, nirvanic. Each page describes how the astral body changes with spiritual development.
Sylvan Muldoon and Hereward Carrington, The Projection of the Astral Body (1929). This is the most practical book on the subject ever written. Muldoon began projecting spontaneously at age 12 and kept a journal for years. Carrington, a researcher at the American Society for Psychical Research, provided the theoretical framework. They describe the false awakening, the floating sensation, the vibration stage, the cord, the double.
Experimental Reports
Hector Durville, The Astral Body and Its Phenomena (1908). Durville made subjects project into rooms where confederates had placed objects. The subjects drew the objects. Durville compared their drawings with the actual objects. He published his results in French. They have never been properly replicated.
Robert Monroe, Journeys Out of the Body (1971). Monroe was a radio engineer who began having spontaneous projections in 1958. He founded the Monroe Institute in 1974. His books describe the vibration state, the different energy frequencies of the astral planes, and the “lifeline” that tethers the projector to the body. He called the astral body the “Second Body” or “Locale II.”
William Buhlman, Adventures Beyond the Body (1996). A modern update. Buhlman focuses on the subjective experience rather than the metaphysical framework. His book describes how to induce projections through intention and relaxation alone, without ritual.
For the complete historical timeline, see our guide to astral projection techniques, which covers methods from the Hermeticists to the Monroe Institute.
What Are the Most Common Misconceptions?
The astral body is not the soul. This is the most persistent error. The astral body is a vehicle. The soul drives it. Confusing them leads to doctrinal tangles that the primary sources never intended.
It is not the same as the etheric body. In Besant’s system and in most Western occult schools, the etheric body is the energy matrix that organizes the physical body. It is denser than the astral body. Damage to the etheric body manifests as illness. Damage to the astral body manifests as emotional or spiritual disturbance. The etheric body cannot travel far from the physical. The astral body can.
Astral projection is not lucid dreaming. The practitioners who have done both are emphatic. In a lucid dream, the world is generated by the dreamer’s mind. In astral projection, the world is a shared, objective environment. Monroe tested this by asking subjects to observe specific signs in the astral and report them. The results were mixed but suggestive.
The silver cord is not a guarantee of safe return. The cord metaphor appears in Ecclesiastes, in the Upanishads, and in dozens of modern accounts. But most practitioners report that they do not see the cord during projection. Muldoon saw his own cord and described it as elastic, about four inches thick, attached at the back of the head. Not everyone agrees.
FAQ
Is astral projection dangerous? Most traditions say no, but they also recommend preparation. The Golden Dawn required six months of preliminary exercises before attempting projection. The Tibetan tradition warns that a frightened or unprepared consciousness can become stuck in the intermediate state.
Can anyone learn astral projection? The historical records suggest yes, but the success rate varies. Muldoon estimated that about one in twenty people can learn with sustained practice. Monroe believed everyone could do it with the right training.
How do I know if I have projected or just dreamed? The traditional test is to look for information you could not have known. The Tibetan tradition advises checking the environment for discrepancies between its apparent location and its actual location. The modern test is to read a clock, look away, and read it again. In a dream, the numbers change. In projection, they stay the same.
The literature on the astral body is not a single tradition. It is a conversation across two thousand years, across cultures that never met, across languages that never translated. What they share is the claim: you are not only your body. You can leave it, return, and describe what you saw.
The books above are the essential readings. Not because they are the final word. Because they are the starting points. The people who wrote them tested the boundary between body and consciousness, and they left records of what they found. We keep those records in this library, where they are treated not as scripture but as data.
To explore the practical methods, see our guide to astral projection techniques. For the symbolism of the subtle body in different traditions, visit the glossary entry on the astral body. For the deeper relationship between the astral body and the practice of soul travel, read our complete guide to astral projection.