Turiya: What Is the Fourth State of Consciousness?

What does turiya mean?

The word turiya means, literally, "the fourth." That bluntness is deliberate. The tradition had no better name for it, because the first three states — waking, dream, deep sleep — can each be described by their contents, and the fourth cannot. Waking has its objects. Dream has its images. Deep sleep has its characteristic blankness. The fourth has no content of its own to point at, so it was given an ordinal rather than a description.

What the word points toward is the awareness in which the other three appear and disappear. You are awake now. Tonight you will dream. Later you will sleep without dreaming. Something registers all three — registers even the seams between them, the small moment of waking when a dream thins out and the room returns. That registering, prior to any particular experience, is turiya. It is not a fifth experience added to the list of three. It is closer to the screen on which the other three are shown, itself never one of the pictures.

The four states of consciousness in the Mandukya Upanishad

The Mandukya Upanishad is twelve verses long — the whole text takes a few minutes to read. It maps consciousness onto the syllable om and its three sounds, A, U, and M, giving each to a state: A to waking (jagrat), U to dream (svapna), M to deep sleep (sushupti). Then comes the silence after the sound has died away, and that silence is turiya. The structure is doing real work — it places the fourth not as a louder note but as the quiet the notes resolve into.

The seventh verse is the one practitioners return to. It describes the fourth almost entirely by negation: "Neither inwardly cognitive nor outwardly cognitive, nor cognitive in both ways... invisible, beyond grasp, without characteristics, unthinkable, indescribable... the cessation of phenomena, tranquil, without a second." The text never says what turiya is. It removes, one term at a time, everything it is not, until what is left cannot be removed. This pointing-by-subtraction has an older name, neti neti — "not this, not this" — from the Brihadaranyaka Upanishad.

Around the seventh century, Gaudapada wrote the first systematic commentary on these twelve verses, the Mandukya Karika, which became a foundation of Advaita Vedanta and reached Shankara two teachers later. Gaudapada treated the fourth not as a higher experience to be acquired but as the unchanging ground the other three already rest on. Read as a record of contemplative observation rather than as doctrine, the claim is exact: whatever changes is content; what does not change is the awareness that notices it changing.

Turiya as pure awareness: the witness of waking, dream, and deep sleep

If this sounds like the witness, sakshi, that is because the two terms describe one fact from two angles. The witness consciousness is the stance — awareness noticing a thought without being carried off by it. Turiya is the substrate — the awareness that was never carried in the first place. One is a practice you take up deliberately; the other is what that practice keeps uncovering underneath itself.

The plainest image is the sky. Waking, dream, and sleep are weather — clouds, storms, clear afternoons — and they move through. The sky does not travel with the weather; it is the space the weather happens in. Turiya is the sky. The teaching is not that you must reach a cloudless sky, which would only be another, calmer kind of weather. It is that the sky has been present behind every cloud, and that a life is mostly spent identified with the clouds and convinced they are all there is.

This is where contemplative practice and ordinary calm diverge. Quieting mental activity — what the Yoga Sutra calls stilling the fluctuations of the mind, the citta-vritti — clears the weather enough that the sky becomes noticeable. But the noticing was never manufactured by the quiet. Patanjali's third sutra puts it in four words: tada drashtuh svarupe 'vasthanam — then the seer abides in its own nature. Not acquires a new one. Abides in the nature it always had.

How to reach the fourth state in practice

Strictly, you cannot reach turiya, because reaching implies covering a distance, and there is none to cover — you are already aware. But the tradition is not naive about the gap between that fact and a person's lived sense of it. The awareness is obscured by habitual identification with content, and identification loosens through practice, not through being argued with.

The instruction is modest. Sit. Let attention settle on something simple — the breath, a sound, the bare sense of being present in the body. When a thought arrives, notice that you noticed it. That small act — catching awareness in the act of being aware — is the entire move. You are not trying to stop thoughts or scrub the mind clean. You are shifting weight from what is seen to the seeing itself, again and again, until the seeing becomes the more obvious of the two.

Deep absorption makes the shift easier. In the jhanas of the Buddhist path, and in samadhi in the yogic one, content thins until awareness stands relatively alone, and the fourth is harder to miss. But it is not locked behind those doors. It is equally present in the pause before you answer a question, in the half-second of bare waking before the day's first thought arrives, in the silence the Mandukya set after om. The sacred here is not somewhere else. It is the most ordinary fact about you, overlooked precisely because it never once leaves.

What contemplative neuroscience sees in pure awareness

For most of its history this was a first-person claim, testable only from the inside. That has started to change. Researchers now group experiences like turiya under the heading of "minimal phenomenal experience" — awareness with little or no content — and treat them as something a laboratory can study. In a 2020 paper in Frontiers in Psychology, Zoran Josipovic and Vladimir Miskovic described nondual awareness as a unified, unchanging consciousness "devoid of other phenomenal contents," the same fact that traditions had labelled pure awareness, rigpa, or Buddha-nature, and they connected it to changes in the brain's default-mode network — the circuitry most active when the mind is busy narrating a self.

A 2026 study in the Journal of Cognitive Neuroscience went further into measurement. Recording EEG from thirty-three Transcendental Meditation practitioners while tracking their experience moment by moment, the researchers found that reports of pure awareness carried a distinct electrophysiological signature — shifts in the temporal complexity and in the aperiodic, non-rhythmic background of brain activity, rather than in any single brainwave. The fourth, on this evidence, is not one frequency you can tune to. It is a different organization of the whole, which is unexpectedly close to what Gaudapada was claiming, in non-neural language, more than a thousand years earlier.

None of this proves the Upanishad's account of reality, and it does not need to. What the measurement offers is corroboration of the report: that there is a recognizable condition in which awareness persists while its contents fall quiet, and that ordinary people, with practice, can find it and describe it consistently enough to register in the data. The tradition kept the map for a very long time. The instruments are only now confirming that the territory is there to be mapped.

You do not have to accept any of it on authority to test it. Sit tomorrow morning, before the first thought of the day has formed. For a moment there is awareness, and almost nothing inside it. That is the fourth. It was never far.