Mandukya Upanishad

1. aum ity etad akṣaram idam sarvam, tasyopavyākhyānam
   bhūtam bhavad bhaviṣyad iti sarvam auṁkāra eva
   yac cānyat trikālātītaṁ tad apy auṁkāra eva

   All is OM: Hari Om. The whole universe is the syllable Om. Everything that was, is, or will be, verily is Om. All that which transcends time, space, and causation is also Om.

2. sarvaṁ hy etad brahma, ayam ātmā brahma
   so’yam ātmā catuṣ-pāt

   All this, everywhere, in truth, is Brahman. This Atman itself, is also Brahman, the Absolute Reality. This Atman or Self has four aspects through which it operates.

3. jāgarita sthāno bahiṣ-prajñaḥ saptāṅga
   ekonaviṁśati-mukhaḥ sthūla-bhug vaiśvānaraḥ
   prathamaḥ pādah

   The first aspect of Atman is the Self in the Waking state, Vaishvanara. Its consciousness is outward-turned. Through its seven instruments and nineteen channels^[1] it experiences the gross objects of the phenomenal world.

4. svapna-sthāno’ntaḥ-prajñaḥ saptāṅga ekonavimśati-mukhaḥ
   pravivikta-bhuk taijaso dvītiyaḥ pādah

   Second is taijasa, Atman in the Dreaming state. In this consciousness is turned towards the inner world. It also operates through seven instruments and nineteen channels, which engage the subtle objects of the mental realm.

5. yatra supto na kaṁ cana kāmaṁ kāmayate
   na kaṁ cana svapnam paśyati tat suṣuptam
   suṣupta-sthāna ekī-bhūtaḥ prajñānā-ghana evānanda-mayo
   hy ānanda-bhuk ceto-mukhaḥ prājñas tṛtīyaḥ pādah

   Third is Prajna in which the Atman is the Self operating in the Deep Sleep state, Prajna. In deep sleep, one becomes undivided, an undifferentiated mass of consciousness, consisting of bliss and feeding on bliss.

6. eṣa sarveśvaraḥ eṣa sarvajñaḥ, eṣo’ntāryami,
   eṣa yoniḥ sarvasya prabhavāpyayau hi bhūtānām

   Find the Experiencer: The one who experiences all of these states of consciousness is the omniscient, indwelling source and director of all. This one is the womb out of which all of the other emerges. All things originate from and dissolve back into this source.

7. nāntaḥ-prajñam, na bahiṣ prajñam, nobhayataḥ-prajñam
   na prajnañā-ghanam, na prajñam, nāprajñam;
   adṛṣtam, avyavahārayam, agrāhyam, alakṣaṇam,
   acintyam, avyapadeśyam, ekātma-pratyaya-sāram,
   prapañcopaśamam, śāntam, śivam, advaitam,
   caturtham manyante, sa ātmā, sa vijñeyaḥ

   The Fourth Aspect is Turiya, In this consciousness is neither turned outward nor inward. Nor is it both outward and inward; it is neither knowing nor knowing. This cannot be experienced through the senses; it is indescribable, incomprehensible, and indefinable, its sole essence being the consciousness of its own Self. This is Pure Consciousness itself. This is the real Self, the coming to rest of all relative existence; It is iutterly quiet, serene, tranquil, filled with bliss, and is one without second. This is the real or true Self that is to be realized.

8. so’yam ātmādhyakṣaram auṁkaro’dhimātram pādā mātrā
   mātrāś ca pādā akāra ukāra makāra iti

   Those Four are identical with “A-U-M” and Silence: That Om, though described as having four states, is indivisible; it is pure Consciousness itself. That Consciousness is Om.

9. jāgarita-sthāno vaiśvānaro’kāraḥ prathamā
   mātrā’pter ādimattvād vā’pnoti ha vai
   sarvān kāmān ādiś ca bhavati ya evaṁ veda

   Vaiśvānara, whose field is the waking state, is the first sound, A, of Om. That sound of A is first and permeates all other sounds. One who who knows thus, encompasses all desirable objects; and becomes the first, ie successful.

10. svapna-sthānas taijasa ukāro dvitīyā
    mātrotkarṣāt ubhayatvādvotkarṣati ha vai
    jñāna-saṁtatiṁ samānaś ca bhavati
    nāsyābrahma-vit-kule bhavati ya evam veda

    Taijasa, whose field is the dream state, is the second sound, U. This intermediate state contains the qualities of the waking and sleeping states. For One who knows thus, knowers of Brahman, the Absolute Reality, will be born into his family.

11. suṣupta-sthānaḥ prājño makāras tṛtīya mātrā
    miter apīter vā minoti ha vā idaṁ
    sarvam apītiś ca bhavati ya evaṁ veda

    Prājña, whose field is deep sleep, is the third sound, M, because this is the measure, and that into which all enters. He who knows thus, measures all and becomes all.

12. amātraś caturtho’vyavahāryaḥ prapañcopaśamaḥ sivo’dvaita
    evam auṁkāra ātmaiva, saṁviśaty ātmanā’tmānaṁ ya evaṁ
    veda ya evaṁ veda

The fourth, Turiya, is soundless: unutterable, the cessation of all phenomena, even of bliss. It is nondual (advaita) reality — one without a second. Thus Om is the ātman, is the real or true Self. One who knows thus, merges the self in the Universal Consciousness.

Om śantih; śantih; śantih