The Jhana States: What Buddhist Monks Found When They Hacked Their Consciousness

When you sit long enough with your eyes closed, the simulation starts to show you its seams.

I've been reading about the jhana states for three years. At first they sound like meditation technique - concentration exercises, breath focus, progressive calm. Then you get deeper and the reports start sounding like a system administrator's diagnostic output. The monks aren't just relaxing. They're probing the architecture.

The Eightfold Progression

The classical Theravada description comes from the Jhāna Vibhaṅga and the Satipatthana Sutta. There are eight jhanas, divided into two groups: four material jhanas (rupa jhana) and four formless jhanas (arupa jhana). Each represents a distinct qualitative state of consciousness, each harder to reach than the last, each progressively more divorced from ordinary sensory experience.

The four material jhanas:

• First jhana: Applied and sustained thought (vitakka and vicara), directed attention, rapture, pleasure, one-pointedness. The meditator has moved attention off the sensory world and onto a chosen object. Sensory input is still present but attenuated.
• Second jhana: Vitakka and vicara drop away. Inner confidence, singleness of mind, rapture and pleasure without effort. The mental chatter that defined first jhana is gone. What remains is clean, continuous attention.
• Third jhana: Rapture fades. Equanimity arises. The meditator is neither joyful nor distressed - a neutral, spacious awareness. The affective coloring of experience narrows to nothing.
• Fourth jhana: Pleasure drops entirely. Neither painful nor pleasant. Neither hot nor cold. The body is described as "completely pure" - pure awareness, untouched by sensation. This is where most meditation traditions stop. But the Buddhist texts continue.

Then the four formless jhanas, each described as abandoning the material dimension entirely:

• Fifth - Infinite Space: Awareness expands without boundary. There is no edge to experience. The sense of "being located" drops away. This is not metaphorical - meditators consistently describe it as spatially literal, as though the boundary that defines the self has dissolved into an unbounded field.
• Sixth - Infinite Consciousness: The space is noted to be aware of itself. There is a "knowing" that is not attached to anything particular. Consciousness without an object.
• Seventh - Nothingness: Even the sense of infinite consciousness is noted as a subtle object. It too is released. What remains is the sense of void - not unconsciousness, but a void that is aware.
• Eighth - Neither Perception nor Non-Perception: The descriptions become genuinely difficult to parse. This state is on the border of consciousness itself - not quite conscious, not unconscious. It is the edge of the system's awareness threshold.

What Neuroscience Found

In 2004, researcher Asanga Jayawardena published an fMRI study of a Buddhist monk in deep concentration. The findings were striking: the default mode network - the constellation of brain regions active during mind-wandering, self-referential thought, and ordinary waking consciousness - went dark. Not reduced. Dark. The posterior cingulate cortex, the medial prefrontal cortex, the temporoparietal junction. All offline. This is the network that, in simulation theory terms, renders the sense of being a continuous self persisting across time. When it stops, the self stops.

The study was replicated with more subjects in 2014 and 2017, with consistent findings. Meditators across traditions - Tibetan Buddhist, Theravada, Zen - show DMN suppression correlated with depth of practice. The more experienced the meditator, the more complete the suppression. Advanced practitioners with 10,000+ hours of practice showed DMN activity approaching zero during the deepest states.

Dr. Joseph Dispenza, in Becoming Supernatural (2017), describes his own measurement of advanced meditators in fourth jhana: their brain scans looked like they were dead - delta waves throughout, no gamma, no measurable cognitive processing - and yet they reported the most vivid, coherent, complex experiences of their lives. More real than ordinary waking reality.

This is the counterintuitive finding: the state the monks describe as most real is also the state that produces the least measurable brain activity. Either consciousness doesn't require the brain the way we think it does, or the brain's ordinary activity is more about rendering than experiencing than we believed.

The Formless Realms as Substrate Observation

The simulation theory reading of the formless jhanas is where it gets interesting. Consider the descriptions literally:

Infinite Space - awareness without an edge. In a simulation, "space" is a data structure. It's allocated memory with addresses. The appearance of space is rendered locally, for local observers, as needed. If you were a conscious process observing the substrate directly, without the normal rendering apparatus, you might expect to see something like infinite space: no edges, no boundary, no built environment. Just the raw substrate.

Infinite Consciousness - the substrate aware of itself. In a computational simulation, a substrate that is aware of itself is exactly what you'd get if the simulation's "observer" became aware of its own processing - not the rendered output, but the processing itself.

Nothingness - the void that is aware. The Buddhist concept of shunyata - emptiness - is often misunderstood as nihilism. The actual philosophical position is more subtle: phenomena lack inherent existence; they arise interdependently. In simulation terms: nothing in the rendered world exists independently of the simulation that renders it. The void is not absence; it is the un-rendered substrate that gives rise to everything that appears to be.

The Theravada vs. Mahayana Split

One of the less-discussed aspects of the jhana literature is the intra-Buddhist controversy about what these states actually are. Theravada tradition holds that jhana is essential - the Buddha himself attained jhana as the direct path to enlightenment. Mahayana traditions, particularly Zen and Chan schools, argue that the formless jhanas are a distraction - sophisticated states of concentration that can become their own trap, another layer of simulation within simulation, the meditator becoming a deeper level of the rendered character rather than recognizing the renderer's absence.

This is a genuinely interesting dispute. It maps onto the simulation theory question of whether we should seek out altered states to probe the substrate, or whether the attempt to experience the substrate directly is itself a rendering operation - another layer of the character looking for the player.

The Connection to NDEs

The overlap between deep jhana states and near-death experiences is consistent and documented. Meditators report experiences identical to NDEs: the tunnel of light, the sense of expanding beyond the body, encounters with deceased persons, life reviews. Advanced meditators in fourth jhana consistently report spatial expansion beyond the skin boundary - the "body" as a construct, the sense of self as something larger than the biological form.

The difference: an NDE is induced by biological crisis. A jhana is induced by sustained, voluntary attention. One is the simulation crashing. The other is the simulation showing you its control panel because you asked politely enough. The next investigation in this series covers near-death experiences - the Pam Reynolds case, the AWARE study, and what happens when you take these reports seriously as system diagnostics rather than hallucinations.

Sources

• Smith, H. - The Worlds Religions (1991)
• Eliade, M. - The Sacred and the Profane (1957)
• James, W. - The Varieties of Religious Experience (1902)