Key Ideas
Oṃ is all this — past, present, future, and what lies beyond time.
Ayam ātmā brahma — this Self is Brahman.
The Self has four quarters — waking (vaiśvānara), dream (taijasa), deep sleep (prājña) and the fourth (turīya).
The fourth is peaceful, auspicious, non-dual — “that is the Self; that is what should be known”.
The Māṇḍūkya Upaniṣad, attached to the Atharva Veda, is the shortest of the principal The Upaniṣads — twelve short prose verses — and one of the most philosophically concentrated. In a few lines it maps the syllable Oṃ onto the four states of the self: waking, dreaming, deep sleep and a “fourth” (turīya) that is not a state at all but the pure, non-dual Self underlying them all. It contains one of the four great sayings of Vedānta, ayam ātmā brahma, “this Self is Brahman”. Through the commentary of Gauḍapāda, the Māṇḍūkya Kārikā, it became the foundation of Advaita Vedānta.
The text
Oṃ — this syllable is all this. Its explanation: what has been, what is, what will be — all is just Oṃ. And whatever else is beyond the three times, that too is just Oṃ. (1)
For all this is Brahman. This Self is Brahman (ayam ātmā brahma). This Self has four quarters. (2)
The first quarter is Vaiśvānara, “common to all men”: the waking state, “outwardly cognitive”, enjoying gross objects (3).
The second is Taijasa, “the luminous”: the dream state, “inwardly cognitive”, enjoying subtle objects made of mental impressions (4).
The third is Prājña, “the wise”: deep sleep, where “one desires no desire and sees no dream”; unified, “a mass of cognition”, made of bliss and enjoying bliss, “the lord of all, the knower of all, the inner controller, the source of all” (5–6).
The fourth (turīya, later caturtha) is described only by negations:
Not inwardly cognitive, not outwardly cognitive, not both-ways cognitive, not a mass of cognition, not cognitive, not non-cognitive; unseen, beyond ordinary transaction, ungraspable, without distinguishing marks, unthinkable, indescribable; whose essence is the experience of the one Self; the cessation of the world; peaceful, auspicious, non-dual — that is the fourth. That is the Self; that is what should be known. (7)
The Upaniṣad then maps the states onto Oṃ, analysed as A–U–M. A is the waking state, the first and pervading sound; U the dream, the intermediate; M deep sleep, the measure in which all merges. The fourth is “without element” — the silence after Oṃ, “the cessation of the world, peaceful, non-dual” (8–12).
Significance
The Māṇḍūkya’s analysis of consciousness through its states is one of the most original contributions of Indian philosophy. Its insight is that the subject persists through waking, dreaming and dreamless sleep — that what we are is not the content of any state but the awareness common to all of them. Gauḍapāda drew from it the radical doctrine that the waking world is no more real than a dream; Śaṅkara built on both; and modern teachers like Ramana Maharshi made “the fourth” the centre of their teaching.
The Commentary Tree
mūla → bhāṣya → ṭīkāIn India a root text is rarely read alone. Terse sūtras or verses (mūla) are unfolded by a commentary (bhāṣya), which is explained by sub-commentaries (ṭīkā, vārttika) — each generation arguing with the last. This is how Māṇḍūkya Upaniṣad has been read.
- Māṇḍūkya Upaniṣad
- Māṇḍūkya Kārikā
215 verses that turn the Upaniṣad into the first system of Advaita — nothing has ever been born.
- Māṇḍūkya Bhāṣya
Comments on both the Upaniṣad and Gauḍapāda’s verses.
Curiosities
did you know?- The Muktikā Upaniṣad says that the Māṇḍūkya alone is enough for liberation; if that fails, read the ten principal Upaniṣads; if that fails, all 108.
Questions to Argue About
debate club →- Is there a state of consciousness beyond waking, dream and sleep — or is the ‘fourth’ simply consciousness itself?
Explore Next
related by shared connectionsTaittirīya Upaniṣad
The Upaniṣad of the five sheaths and the graduation address — it defines Brahman as “truth, knowledge, infinity”, peels away the layers of the self from food to bliss, measures the bliss of Brahman, and tells departing students “Treat your mother as a god.”
Kena Upaniṣad
The “By whom?” Upaniṣad — by whom is the mind sent forth, the breath set going, speech uttered? Its answer is the paradox that Brahman is known only by those who know they do not know it — and a story of the gods humbled by a blade of grass.
Muṇḍaka Upaniṣad
The Upaniṣad of the “shaven head” — it distinguishes the “lower knowledge” of the Vedas and sciences from the “higher knowledge” of the imperishable, compares ritual to leaky boats, gives the image of two birds on one tree, and India its national motto, “Truth alone triumphs”.
Śvetāśvatara Upaniṣad
The most theistic of the principal Upaniṣads — it identifies Brahman with Rudra-Śiva, a personal Lord to be loved, blends Vedānta with early Sāṃkhya and Yoga, and first uses the words māyā and bhakti in their later senses.
Ramana Maharshi
The silent sage of Arunachala (1879–1950), who at sixteen experienced his own death and the deathless Self, and taught one practice above all — self-inquiry, “Who am I?” — the simplest and most direct path of Advaita.
Yogācāra
The “mind-only” school of Mahāyāna Buddhism, founded by Asaṅga and Vasubandhu — the world we experience is a construction of consciousness, carried by a “storehouse” of karmic seeds; awakening is the transformation of the basis of consciousness itself.