Brain Waves & Meditation on OM[AUM]: An insight

Introduction: –

Please go through this simple content which is nothing but my experience only. Just as it is: Thought of sharing my experience. Please spare few minutes. 🙏😊❤️

IMPORTANCE OF MEDITATION:

Since ancient time function of brain and meditation have been linked.

We can understand the relationship between brain activity and meditation by the use of modern technology such as EEG. Basically, we are all vibrational beings living in the vibrational universe.

Frequency of vibration determines our experience of reality. The fundamental elements of our physical vibrations are known as brainwave frequencies. Frequencies are measured in Hertz. In brain mapping the frequencies are measured in Hertz which are typically in the range between 0.5 to 60Hertz. According to studies, published in different websites, during meditation a discernible brainwave patterns seen  on EEG.

In neuroscience, there are five distinct brain wave frequencies, known as Alpha, Beta, Theta, Delta and Gamma.

To understand the function of brainwave frequencies, which affect our daily life following vibrational patterns are described in brief.

Delta (0.5-3.0 Hz): The deep sleep Wave.

The Delta frequency is the slowest of the frequencies and it is experienced in deep, dreamless sleep and in very deep, transcendental, meditation where awareness is completely detached. Delta is the realm of unconscious mind. It is the Gateway to the Universal mind.

Alpha (7.5-14 Hz): The Deep Relaxation wave:

Alpha brain waves are present in deep relaxation with the eyes usually closed and while daydreaming or during light meditation. It is an optimal time to program the mind for success. It is the Gateway to the Subconscious mind. It heightens imagination, visualization, memory, learning and concentration. It lies at the base of consciousness of human mind.

Theta (4-7.5 Hz): The Light Meditation and Sleeping Wave.

Theta brain waves are present during deep meditation and light sleep including REM dream state. It is the realm of Subconscious mind. It is also known as twilight state as it is normally experienced between Alpha (drift off to sleep) and Delta (arise from deep sleep).A sense of deep spiritual connection and with the Universe can be experienced at Theta. Voice of Theta is silence.

Beta(14-40Hz): The waking Consciousness and Reasoning wave.

Beta brain waves are associated with normal waking consciousness and a heightened state of alertness, logic and critical reasoning. Daily activities are performed in this state. Too much Beta can translate into stress, anxiety and restlessness. The voice of Beta is the little nagging chatterbox of inner critic.

Gamma(40-80Hz): The Insight Wave.

This range is recently discovered. Little is known about this state of mind. Gamma waves with the highest frequency can have a frequency of anywhere between 25 and 100 Hz. Initial research shows that Gamma waves are associated with bursts of insight and high level information processing. Gamma brain waves are fastest brainwave frequency with smallest amplitude. Feelings of Blessings with peak concentration has been reported by experienced meditators.

Neuroscientists believe that gamma waves are able to link information from all parts of the brain-the gamma wave originates in the thalamus and moves back of the brain to the front and back again @40Hz.This is the brainwave state of that feeling that anything can be done.

Now we may draw analogy of the above topic with Mandukya Upanishads, which is shortest among all Upanishads. According to the Mandukya Upanishad, four conditions of Spirit can be described as below.

1)Waking condition: Perception turned outward.

2)Mental condition: Perception turned inward, known as dreaming condition. Self enjoys subtle matter.

3)Deep sleep condition: No desire, no dream. This is intellectual condition. Because of union with Self and his unbroken knowledge, one feels joy. He knows joy. His mind is illuminated.

ॐ~AUM

A~ Waking

U~ Dreaming

M~ Deep Sleep

Turiya: The Fourth condition of the Self which can be achieved through deep meditation that corresponds to “OM” as ONE , invisible Word. Self is Whole and beyond bargain.

The world disappears in HIM. SELF is one without a second.

This condition is known as #Turiya.

Please read Mandukya Upanishad in two parts to understand the topic which you will find inline with Brain waves pattern. Links are here:

1:MaNDukya Upanishad- The Nature of OM: – Part-1

2:MaNDukya Upanishad- The Nature of OM: – Part-2

Any decrease in mind clutter is an increase in our vibrational connection to higher Consciousness.

MaNDukya Upanishad- The Nature of OM: – Part-2

Introduction:

Mandukya Upanishad belongs to Atharva Veda. It is the shortest of all the Upanishads with only 12 verses and placed in the 6th position in the list of Ten Principal Upanishads.

This Upanishad teaches the significance of the sacred syllable ॐ~AUM (OM) and it correlates with four states of Consciousness. It describes the Turiya state, the state of transcendental Consciousness in which all the divisions and Duality disappears. The SELF alone exists in its pure state.

Among the Upanishads, the “Mandukya” may be regarded as the most important. It is said : ” mandukyam ekam eva alam mumukshunam vimuktaye”. For the liberation from bondage, for a seeker, the maNDukya alone is sufficient.

Upon meditating on the Mystic Syllable OM [AUM], mind can be trained to achieve freedom gradually to attain ultimate Reality.

Please read my previous post on Mandukya Upanishad, Part-1, where I have discussed up to 7th mantra out of total twelve mantras. 7th mantra is most important among the Vedic scriptures. This mantra describes the nature of Absolute reality~ Brahman. Please read first part of the post. Link is here:-

In this post, I will discuss the last five Mantras [from 8th mantra to 12th mantra].

माण्डूक्योपनिषत्

॥ अथ माण्डूक्योपनिषत् ॥

Mantra-8:- ॐ~AUM (OM) with four quarters:

“सोऽयमात्माऽध्यक्षरमोंकारोऽधिमात्रं पादा मात्रा मात्राश्च पादा अकार उकारो मकार इति “॥ ८॥

“so.ayamAtma.sdhyakSharamo~NkAro-adhimAtram pAdA mAtramAtrAshcha pAdA akAra ukAro makAra iti” – [8]

“The same Atman, (which has been described in 7th Mantra as having four quarters) is again, AUM, from the point of view of the syllables. The “AUM “with parts is viewed from the stand point of sound. The quarters the letters and the letters are the quarters. The letters here are A, U and M”.

According to Shankara, 7th mantra have concentrated on the abhidheya meaning ‘that which is being spoken of’, i.e. the thing named or denoted. OM [AUM], therefore, is effectively the abhidhAna-name or appellation. This means that Atman is equated to OM in the linguistic sense. The letters constituting OM are A, U and M.
Mantra-9:- The first mAtra of OM-akAraH: the letter “A” : vaishvAnara- the waking state.

“जागरितस्थानो वैश्वानरोऽकारः प्रथमा मात्राऽऽप्तेरादिमत्त्वाद् वाऽऽप्नोति ह वै सर्वान् कामानादिश्च भवति य एवं वेद “॥ ९॥

“jAgaritasthAno vaishvAnaro-akArah prathamAmAtra-a-apteraadimattvaadvA-a-apnoti ha vai sarvAnkAmAnAdishcha bhavati ya evaM veda”.-[9]

“He who is VaishvAnara, having for its sphere of activity the waking state is A, the first letter of AUM, on account of its all-pervasiveness or on account of being the first. One who knows this attains the fulfilment of all desires and becomes the first of all”.

prathamA mAtra: – The first mAtra of OM-akAraH: the letter “A” vaishvAnara- the waking state. AdimatvatvAt: being the first. Pervasiveness-“A” which pervades all sounds. “A” is the fundamental sound. We cannot speak any word without opening the mouth and the sound thus produced is “A”. We can regard this sound as pervading every other sound. Similarly, we regard the waking state as having primacy. We only know of the existence of the dream state and deep sleep states when we are at waking state. Obviously, we have to be awake in order to pursue this enquiry and to attain enlightenment.

In the scripture VaishvAnara is said to pervade the whole of the Universe. In Bhagavad-Gita, Ch10.33, Lord Krishna says: ” I am the letter “A”, describing himself as Ishwara. This mantra is advocating Upasana on OM, with specific attention on the first letter “A”.

One who understands this, gets all he wants; becomes leader among men.

Mantra-10:- The letter “U”, the second mAtra of OM is “taijasa”, the dream state

“स्वप्नस्थानस्तैजस उकारो द्वितीया मात्रोत्कर्षाद् उभयत्वाद्वोत्कर्षति ह वै ज्ञानसन्ततिं समानश्च भवति नास्याब्रह्मवित्कुले भवति य एवं वेद” ॥ १०॥ 

“svapnasthAnastijasa ukAro dvitIyAmAtrotkarShAdubhayatvAdvotkarShati ha vai j~nAnasantati-nsamAnashcha bhavati nAsyaabrahmavitkule bhavAti va evaM veda” -[10]

“The dreaming condition [taijasa], called mental condition, corresponds to the second letter “U”. It upholds; stands between waking and sleeping. He who understands, upholds the tradition of Spiritual knowledge. looks upon everything with an impartial eye. No one ignorant of Brahman is born into his family”.

The letter “U”, the second mAtra of OM is “taijasa”, the dream state, because both are regarded as superior and also are in the middle of their respective series. Whosoever knows this will become superior in knowledge and accepted by all. All members of his family will be wise. As a matter of fact, A being the first of all sounds is superior to all letters. But “U” coming after “A” may be said superior to “A” in all indirect way. as such the subtle taijasa is regarded as superior to vishva because subtle is superior to gross. Gross can be considered as the effect of the subtle cause. Gross equates to matter, subtle to energy. Mind is superior to physical body. State of mind makes us superior to the animals. Gross body returns to earth on death, but the subtle and causal body remains present for rebirth. 

Note:- At the macrocosmic level, at the end of the Universe[Pralaya], the entire gross creation [Virat] is subsumed into Hiranyagarbha. 

Mantra-11:- Deep sleep, the intellectual condition, called “Prajna” corresponds to the third letter “M”.

“सुषुप्तस्थानः प्राज्ञो मकारस्तृतीया मात्रा मितेरपीतेर्वा मिनोति ह वा इदꣳ सर्वमपीतिश्च भवति य एवं वेद” ॥ ११॥

“suShuptassthAnaH prAj~no makArastRRitIyA mAtra meterapItervA minoti havA idaM sarvamapItishcha bhavati ya evaM veda”-[11]

“Undreaming sleep, called the intellectual condition [prAj~no], corresponds to the third letter “M”. It weighs and unites. he who understands, weighs the world; rejects; unites himself with the cause”.-[11]

Sankara Explains:-

One who is prAj~no associated with deep sleep is “M” , the third letter{sound) of AUM. The key word “miti” in the mantra needs to be understood. “miti” means measure. As food grains are measured in utensils before use and that is filled again when it is reused on regular basis, which means grains reappear again. similarly, at individual level, the waking and dream states as though disappear in deep sleep, emerge again sometime later. Similarly, at the macrocosmic level, the gross[Virat] and subtle[Hiranyagarbha] worlds disappear at the end of creation into the causal state(Ishwara~antaryamin) and reappear at the next creation. This is analogous to the scientific theory of “Big-Bang & Big-Crunch”. In the same manner, while chanting OM (AUM), the sound “A” and “U” disappear when we close mouth and only sound “M” remains. And the sound “A” and “U” reappear again when the mouth is opened for chanting AUM. waking and dream states are merged in deep sleep. As we have seen in mantra-4 of this Upanishad, that they[ A= Vishva & U= Taijasa] become “mass of consciousness” (prajnanaghana)  in M (deep sleep state).

In deep sleep, all perceptions and cognitions converge into a single mode of the mind: It becomes mass of Consciousness[ ekibhutah]. There is no modifications of the mind[ due to absence of Vrittis].

The happiness of deep sleep is greater than all other forms of happiness. 

Therefore one who knows this, comprehends the real nature of the Universe. He realises himself as Atman and the cause of the Universe i.e. Ishwara.

Mantra-12:- “Amaatra”- The fourth letter: “Turiya”

“अमात्रश्चतुर्थोऽव्यवहार्यः प्रपञ्चोपशमः शिवोऽद्वैत एवमोंकार आत्मैव संविशत्यात्मनाऽऽत्मानं य एवं वेद “॥ १२॥

“amAtrashchaturtho-avyavahAryaH prapa~nchopashamaHshivo-Advaitaevamo~NkAra-atmaiva saMvishatyAtmanA-a-AtmaM ya evaM veda ya evaMveda”-[12]

“The fourth conditioned of the Self corresponds to OM as one, indivisible word. He is whole; beyond bargain. The world disappears in Him. He is the good; the one without a second. Thus OM is nothing but Self. He who understands, with the help of personal self, merges himself into the impersonal Self.”

The part less “OM” is the fourth quarter; It is beyond all conventional dealings; It is the limit of the negation of the phenomenal world. It is all- Auspicious, all-Blissful; It is One without a second; the Non-Dual Reality; This OM is verily the same as the Atman or Self within. The Self realises Itself through the Self; He who knows thus, merges himself  into the impersonal Self.

Conclusion:-

A) Individually( for Jiva), the waking consciousness is called Vishva. It is called Taijasa in dream and Prajna in deep sleep state. Correspondingly, from the view of Cosmic level, these are: Virat in waking, Hiranyagarbha in dreaming and Ishwara in deep sleep. 

B) The relationship between individual and the cosmic, between Vishva & Virat, Taijasa & Hiranyagarbha, Prajna & Ishwara is integral part of ONE [ Non-Dual Consciousness]. This realisation will put Jiva in Ishwratwa and make it  Omnipresent, Omniscient and Omnipotent.

C) The knower of Brahman, who has realised the highest Truth, will enter into the Self by burning away the Third state of latency[ the dormant Vasanas~ (causal) are burnt]. Henceforth, he is not born again, as there are no Karmas to cause a further birth.

D) AUM is realised when the illusion of DUALITY vanishes.

Recommended readings:

  1. Back to the Truth: 5000 years of ADVAITA by Dennis Waite.**
  2. THE TEN PRINCIPAL UPANISHADS: Translated by Shree Purohit** Swami and W.B.Yeats
  3. Brahma Sutra Bhasya of Sankaracharya: Translated by Swami Gambhirananda.**
  4. Commentary of Mandukya Upanishad: By Swami Krishnananda.
  5. MANDUKYA Upanishad By Swami GuruBhaktananda.
  6. The Mandukya Upanishad: with Gaudapada’s Karika and Sankara’s commentary: By swami Nikhilananda
  7. EIGHT UPANISADS -VOL-1 with commentary of Sankaracharya, Translated by SWAMI GAMBHIRANANDA.
  8. THE TAITTIRIYA UPANISHAD: SHIKSHAVALLI-ANANDAVALLI-BHRIGUVALLI with Sri Shankara’s Commentary By Sri Swami Satchidanandera Saraswati.
  9. A-U-M Awakening to Reality : By Dennis Waite***
  10. Information available on internet.

             It is my sincere request to the esteemed readers to share their opinion or queries if any. Suggestions to make the site attractive will be highly helpful for me. Readers are requested to read all the posts to have continuation of the topic from the beginning. My mail ID is :   arun7663@gmail.com 

MaNDukya Upanishad- The Nature of OM: – Part-1

Introduction:

The Mandukya Upanishad, belongs to Atharva Veda. It is the shortest of all the Upanishads with 12 verses and placed in the 6th position in the list of Ten Principal Upanishads. This Upanishad teaches the significance of the sacred syllable ~AUM (OM) and it correlates with four states of Consciousness. It describes the Turiya state, the state of transcendental Consciousness in which all the divisions and Duality disappears. The SELF alone exists in its pure state. Upon meditating on the Mystic Syllable , OM , mind can be trained to achieve freedom gradually to attain ultimate Reality.

माण्डूक्योपनिषत्

॥ अथ माण्डूक्योपनिषत् ॥

ॐ भद्रं कर्णेभिः श‍ृणुयाम देवा
भद्रं पश्येमाक्षभिर्यजत्राः ।
स्थिरैरङ्गैस्तुष्तुवाꣳसस्तनूभिर्व्यशेम देवहितं यदायुः ॥

स्वस्ति न इन्द्रो वृद्धश्रवाः
      स्वस्ति नः पूषा विश्ववेदाः ।
स्वस्ति नस्तार्क्ष्यो अरिष्टनेमिः
      स्वस्ति नो बृहस्पतिर्दधातु ॥

ॐ शान्तिः शान्तिः शान्तिः ॥

Om! Shining Ones! May our ears hear the good. May our eyes see the good. May we serve HIM with the whole strength of our body. May we, all our life, carry out HIS will. Peace, peace and peace be everywhere.

Everything is OM

 ॐ इत्येतदक्षरमिदꣳ सर्वं तस्योपव्याख्यानं
भूतं भवद् भविष्यदिति सर्वमोङ्कार एव
यच्चान्यत् त्रिकालातीतं तदप्योङ्कार एव  ॥ १॥
First Mantra: Hari OM! OM ityetadakSharamidaM sarvam tasyopavyAkhyAnaM bhutaM bhavadH bhaviShyaditi sarvamoMkAra eva. yachchaanyatH trikAlAtitaM tadapyoMkaAra eva.(1) 

OM + ity + etad + akSharam => means This syllable is OM.                idaM sarvam => means This (OM) is all. tasya + upavyAkhyAnaM =>  Explanation begins with this Omkar.  bhutaM ( past) bhavadH ( present) bhaviShyat (future)  sarvam oMkAra eva. => Past , present future; everything is OM. yachchaanyatH trikAlA (three time periods) titaM tadapy + oMkaAra eva. ( even that too is OM which transcends three division of time).

Mantra 1. Hari OM! The Word OM is Imperishable. All this it’s manifestation. Past , present future; everything is OM. Whatever transcends the three divisions of time , that too is OM.

सर्वं ह्येतद् ब्रह्मायमात्मा ब्रह्म सोऽयमात्मा चतुष्पात् ॥ २॥
Second MantrasarvaM hyetad brahmAyamAtmA brahma so ayamAtma chatuShpAt (2) 

Mantra 2: All this is verily Brahman. (ब्रह्मायमात्मा ब्रह्म) ” Ayam atma Brahma” There is nothing that is not Brahman. The Personal Self is the impersonal Brahman. (सोऽयमात्मा चतुष्पात् ) It has four aspects (states), also known as four quarters.

” Ayam atma Brahma” is one of the four mahaVakyas from four Vedas. It signifies the realization that who I am really is that same Brahman. The word “chatuShpad” (चतुष्पात् )refers to the four aspects of Consciousness. Three states of Consciousness: 1) Waking[GROSS], 2) Dreaming [SUBTLE] and 3) Deep Sleep [CAUSAL]. Fourth is the Reality which is the Background of all states. Details to be known from the following verses.

The first pada: Waking state Consciousness.

जागरितस्थानो बहिष्प्रज्ञः सप्ताङ्ग एकोनविंशतिमुखः
स्थूलभुग्वैश्वानरः प्रथमः पादः ॥ ३॥
Third Mantra : jAgaritasthAno bahiShpraj~naH saptA~Nga ekonaviMshatimukhaH sthUlabhugvaishvAnaraH prathamaH pAdaH (3)

Mantra 3: First comes the material condition-common to all. Perception turned outward. Seven limbs*( सप्ताङ्ग = 7 limbs), Nineteen mouths**( एकोनविंशतिमुखः = 19 mouths), wherein the Self enjoys course matter. This is known as waking condition. Waking State~ jAgrat.  The individual is known here as vaishvAnara (Virat) who is in the waking state of consciousness(the gross world). Bahih PrajNa: (बहिष्प्रज्ञः) means the outward tendencies which is predominant in this state. The Seven Limbs: the macrocosm and microcosm are paired up and through 19 mouths, one enjoys the gross objects( स्थूलभुग्वैश्वानरः ) of this world.

*Seven limbs are: Heavens(he ad), Sun(eye) air(breath), fire(heart), water(belly), earth(feet) and space(body).

**Nineteen mouths are: 1) Five organs of senses- Hearing, Touching, Seeing, Tasting and Smelling. 2) Five organs of action- Speaking, Handling, Walking, Generating and Excreting. 3) Five living fires- Prana, Apana, Samana,Vayana, and Udana. 4) Four states of mind:  Discursive mind (Manas), Discriminative mind(Buddhi), Mind-Material(Chitta) and Personality(Ahangkara).  { 3×5+4 = 19}

The Second Pada – Dream state Consciousness.

स्वप्नस्थानोऽन्तःप्रज्ञः सप्ताङ्ग एकोनविंशतिमुखः
प्रविविक्तभुक्तैजसो द्वितीयः पादः ॥ ४॥
Fourth Mantra: svapnasthAno.antaHpraj~naH saptA~Nga
ekonaviMshatiMukhaHpraviviktabhuk taijaso dvitIyaH pAdaH (4)

Mantra 4: Dream State:  Taijasa~  the dreamer creates dream world out of his or her own mind. In the dream state, entire dream world seems to be as real as is experienced in waking condition, whatever be the time duration of the dream.
In dream, the person experience the subtle world  (pain or pleasure,  joy or fear) through dream sense organs, not the physical sense organs. In dream, mind reflects the impression left by waking state like a piece of canvas with the pictures painted on it. Dream state experience that as if it were like waking. Like in waking state, here the sphere of activity is inward. It enjoys the subtle objects (प्रविविक्तभुक्तैजसो ) of the mental world. Seven limbs and nineteen mouths also work here but INWARD. Here Anta prajNa is predominant. 

 

According to BRRihadAraNyaka Upanishad IV.3,9:
When he dreams, he takes away a little of the impression of this all embracing world (the waking state), himself puts the body aside and himself creates a dream body in it’s place, revealing his own lustre by his own light and dreams. In this state, the man himself becomes the light.

The Third Pada -Deep Sleep Consciousness      (Vyashti)

यत्र सुप्तो न कञ्चन कामं कामयते न कञ्चन स्वप्नं
पश्यति तत् सुषुप्तम् । सुषुप्तस्थान एकीभूतः प्रज्ञानघन
एवानन्दमयो ह्यानन्दभुक् चेतोमुखः प्राज्ञस्तृतीयः पादः ॥ ५॥
Fifth Mantra: yatro supto na ka~nchana kAmaM kAmayate na ka~nchana svapnaMpashyati tat suShuptam. suSuptasthAna ekibhUtaH praj~nAnaghana evAnandamayo hyAnandabhukchetomukhaH prAj~nastRRitIyaH pAdaH. (5)

Mantra 5:The Deep Sleep state (SuShupta~SU=Sundar/excellent +sUpta=Sleep) ~ prajNa and antaryAmin.
In this state, waking world and dreaming world temporarily ceases. We exist here in non dual state. Most refreshing state. A state of Bliss(with ignorance). In the waking and dreaming state, we are diverted from this state of bliss, though knowledge of our true nature is absent here. All the perceived limitations are removed in this temporary state but ready to spring forth as soon as we move to waking world.

In that sleep state, not for anything desirable does one have any desire.(यत्र सुप्तो न कञ्चन कामं कामयते).  Not the slightest trace of dream does it see in that state of deep sleep.(न कञ्चन स्वप्नं पश्यति तत् सुषुप्तम् ). In the sphere of deep sleep, there is just one ” homogenous mass of consciousness” alone (सुषुप्तस्थान एकीभूतः प्रज्ञानघन).  Because of his union with the Self and his unbroken knowledge of it, he is filled with joy, he knows his joy, his mind is illuminated (एवानन्दमयो ह्यानन्दभुक् चेतोमुखः). Such is the called third quarter called prajNa (चेतोमुखः प्राज्ञस्तृतीयः पादः).

The Ishwara State of Consciousness.

एष सर्वेश्वरः एष सर्वज्ञ एषोऽन्तर्याम्येष योनिः सर्वस्य
प्रभवाप्ययौ हि भूतानाम् ॥ ६॥
Sixth Mantra: eSha sarveshvaraH eSha sarvaj~na eSho.antaryAmyeSha yoniH sarvasyaprabhavApyau hi bhUtAnAm. (6)

Mantra 6: The Self is Lord of all. He is inner controller and inhabitant of the hearts of all. He is Omniscient, the source of all; creator and dissolver of  all beings. there is nothing He does not know.

The fruit of the process of “Negation”:

नान्तःप्रज्ञं न बहिष्प्रज्ञं नोभयतःप्रज्ञं न प्रज्ञानघनं
न प्रज्ञं नाप्रज्ञम् । अदृष्टमव्यवहार्यमग्राह्यमलक्षणं
अचिन्त्यमव्यपदेश्यमेकात्मप्रत्ययसारं प्रपञ्चोपशमं
शान्तं शिवमद्वैतं चतुर्थं मन्यन्ते स आत्मा स विज्ञेयः ॥  ७॥
Seventh Mantra: nAntaHpraj~naM na bahiShpraj~naM  nobhayataHpraj~nam  napraj~nAnaghanaM  na praj~nam nApraj~nam.
adRRiShTamavyavahAryamagrAhyamalakShaNamachintyamavyap adeshyamekAtmapratyayasAraM manyante sa AtmA sa vij~neyaH.(7)

 

Mantra 7: Negation Phase: He is not knowable by perception, turned inward or outward, nor by both combined. He is neither that which is known, nor that which is not known, nor is He the sum of all that might be known. He can not be seen, grasped, bargained with. He is undefinable, unthinkable, indescribable.

nAntaHpraj~naM = not the knower of the internal (subtle)

na bahiShpraj~naM = not the knower of the external (gross)

na bahiShpraj~naM = not the knower of both

napraj~nAnaghanaM = not the knower of deep sleep

na praj~nam = nor consciousness

nApraj~naM = nor unconsciousness.

Assertion Phase: The only proof of His existence is union with Him. The world disappears in Him. He is the peaceful, the good, the ONE without a second. This is the fourth condition of the Self- The most worthy of all. This is the Atman

This 7th mantra is most important among the Vedic scriptures. This mantra describes the nature of Absolute reality~ Brahman. 

Conclusion:

According to the Mandukya Upanishad, four conditions of  The Self (“Atman”) can be described as below :-
1) Waking condition: Perception turned outward.
2) Mental condition : Perception turned inward, known as dreaming condition. Self enjoys subtle
matter.
3)Deep sleep condition: No desire, no dream. This is intellectual condition. Because of union with Self
and his unbroken knowledge, one feels joy. He knows joy. His mind is illuminated.
ॐ~AUM
A~ Waking
U~ Dreaming
M~ Deep Sleep
The Fourth condition of the Self  can be achieved through deep meditation that corresponds to “OM” as ONE. Self is Whole and beyond bargain. The world disappears in HIM. SELF is one without a second. This condition is known as #Turiya#

Recommended readings:

  1. Back to the Truth: 5000 years of ADVAITA by Dennis Waite.**
  2. THE TEN PRINCIPAL UPANISHADS: Translated by Shree Purohit** Swami and W.B.Yeats
  3. Brahma Sutra Bhasya of Sankaracharya: Translated by Swami Gambhirananda.**
  4. Commentary of Mandukya Upanishad: By Swami Krishnananda.
  5. MANDUKYA Upanishad By Swami GuruBhaktananda.
  6. EIGHT UPANISADS -VOL-1 with commentary of Sankaracharya, Translated by SWAMI GAMBHIRANANDA.
  7. THE TAITTIRIYA UPANISHAD: SHIKSHAVALLI-ANANDAVALLI-BHRIGUVALLI with Sri Shankara’s Commentary By Sri Swami Satchidanandera Saraswati.
  8. A-U-M Awakening to Reality : By Dennis Waite***
  9. Information available on internet.

             It is my sincere request to the esteemed readers to share their opinion or queries if any. Suggestions to make the site attractive will be highly helpful for me. Readers are requested to read all the posts to have continuation of the topic from the beginning. My mail ID is :   arun7663@gmail.com