Three, four, five, seven: almost every culture has imagined the human being in layers. And something really does surround us beyond the skin, just not in the way people thought.
Skin is the visible boundary of the body. Yet everyone knows moments when the boundary lies further out: when someone stands too close, when you feel eyes on the back of your neck, when you could cut the air in a room with a knife.
For thousands of years, experiences like these have given rise to models that picture the human being as an onion: the body at the centre, around it a life force, then feelings, then thought, and the spirit either on the outside or at the very core. The number of layers changes, but the direction stays remarkably similar: from coarse to subtle, from mortal to immortal.
The aura of esotericism is the youngest form of this idea. It turns the invisible layers into something that can supposedly be seen, photographed and treated. This page follows both trails: the sheaths people have believed in, and the ones that can actually be measured.
The Egyptians thought of a person as made of several parts. The Ka is the life force, a double that lives on offerings. The Ba, often shown as a bird with a human head, can travel between the tomb and the world. If the right rites are performed, the two unite after death to become the Akh, the “effective”, transfigured spirit.
3 soul partsThe Taittiriya Upanishad describes five sheaths around the self, from coarse to subtle: the food sheath (the body), the sheath of breath and life force, the sheath of mind and senses, the sheath of discernment and, innermost, the sheath of bliss. The image of an onion is often used for it.
5 sheathsIn traditional Chinese medicine, Wei Qi circulates between skin and muscle. It is said to protect the body against external influences such as wind and cold, to open and close the pores and to regulate temperature: a protective layer at the surface.
1 protective layerThe Neoplatonists imagined “vehicles” (Greek ochema) between the immortal soul and the body. Proclus describes a luminous, immortal vehicle and a second one made of pneuma, breath, which perishes with the body. Here the aura resurfaces as air.
Body + 2 vehiclesHelena Blavatsky combines Indian terms into a sevenfold human being: dense body, etheric double, life force (Prana), desire (Kama), mind (Manas), wisdom (Buddhi) and pure spirit (Atma). The lower four die, the upper three endure. Almost every later aura teaching builds on this.
7 principlesRudolf Steiner, formerly a Theosophist, divides the human being into four: physical body, etheric body (life forces), astral body (sensation and desire) and the I. This scheme still shapes Waldorf education and anthroposophic medicine today.
4 membersThrough his dye screens, the London physician Walter J. Kilner describes an etheric double close to the skin, then an inner and an outer aura extending a few inches beyond the body. He alone gives distances, and he hopes for diagnoses.
3 layersThe Yale anatomist Harold Saxton Burr measures voltages on living things with sensitive voltmeters and puts forward an “electro-dynamic theory of life”: an electrical field, he argues, shapes the organism. The measurements are real; the far-reaching interpretation was never confirmed.
1 fieldIn Hands of Light, Barbara Ann Brennan describes seven layers of the “human energy field”, alternately structured and fluid, each assigned to a chakra. The book becomes the foundation of many energy-healing schools.
7 layersA panel at the newly founded Office of Alternative Medicine of the US National Institutes of Health coins the term “biofield” for the energy field that Reiki, Therapeutic Touch and similar practices claim to address. In 1994 it becomes a subject heading in the medical database. A word, not evidence.
1 termRings and list are linked: tap a layer to highlight it. The spacing of the rings is illustration, not assertion; apart from Kilner, none of the models gives measurements.
Lay the models side by side and a shared framework emerges: body, life force, feeling, thought, spirit. Theosophy deliberately mapped Indian, Greek and Christian terms onto this grid, and later teachings adopted it.
| Level | Upanishads | Neoplatonism | Blavatsky | Steiner | Brennan |
|---|---|---|---|---|---|
| Body | Annamaya · food | Body | Sthula Sharira | Physical body | (body, not counted) |
| Life force | Pranamaya · breath | Pneumatic vehicle | Linga Sharira, Prana | Etheric body | Etheric layer |
| Feeling | Manomaya · mind & senses | lower soul | Kama | Astral body | Emotional, astral layer |
| Thought | Vijnanamaya · discernment | rational soul | Manas | I | Mental layer |
| Spirit | Anandamaya · bliss | Luminous vehicle | Buddhi, Atma | (Spirit Self etc., later scheme) | Celestial, ketheric layer |
This mapping is a simplification. Each tradition has its own variant counts, and in their original contexts the terms do not mean exactly the same thing.
Something really does surround every body: warm air, radiation, bacteria, faint fields, a trace of light. None of it is the aura of esotericism. Taken together, though, they form a remarkable envelope.
The following layers have been measured, published and can be checked. Some can be seen with the right camera, others can only be detected with sensors in shielded rooms. One of them you can smell.
Slide the point outwards from the skin. The cards show what surrounds you at that distance; the number shows which of Hall's zones you are in.
In 1996, nine-year-old Emily Rosa from Colorado had a question for her school project: if healers can sense a person's energy field, shouldn't they be able to tell which of their hands my hand is over?
The method was called Therapeutic Touch. It was taught at nursing schools and promised to sense and rebalance patients' “energy field” with the hands, without touching them.
Emily sat behind a screen. 21 practitioners with one to 27 years of experience put their hands through openings. After a coin toss, Emily held her hand over the right or the left one. Over 280 trials the practitioners were right in 44 % of cases, less than the 50 % that guessing yields.
In 1998 the study appeared in the Journal of the American Medical Association. Emily was eleven and is regarded as the youngest person ever to publish in a peer-reviewed medical journal.
Behind the screen, someone holds a hand over your left or right hand. Can you feel the field? Tap that side.
Near space is anchored in the brain, distance zones can be felt in everyday life, and we perceive other people's warmth and smell without thinking about it. The aura gives this feeling a shape.
Since Plato, the human being has been imagined as a ladder, from the mortal body to the immortal spirit. Layers turn this hierarchy into space: the perishable on the outside, the lasting within or above.
Since the 19th century the sheaths have worn the names of physics: ether, field, energy, frequency. The terms sound measurable. But once you measure them, all that remains of the aura is what was there anyway: warmth, light, air.
Almost all the models let the outer or inner layers outlast death. The Ka, the luminous vehicle, Atma, the I. The sheath is also a promise.