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Friday, April 20, 2018

श्री रामानुजाचार्य अवतार जयन्ति (śrī rāmānujācārya avatāra jayanti - Sri Ramanujacharya incarnation anniversary)





அரிய நம்பி ஆயிரம் பேருடையான் அன்னோன்
உரியநம்பி அன்புடையான் யெல்லாம் தெரியின்
பெரியனம்பி போலொருவர் பேருலகில் இல்லை
அறிஞன் இராமானுஜன்




श्री गुरुभ्यो नमः (śrī gurubhyo namaḥ - salutations to the guru)
Today is the sacred महा अवतार जयन्ति (mahā avatāra jayanti – sacred incarnation anniversary) of परमाचार्य श्री रामानुजाचार्य (paramācārya śrī rāmānujācārya). Around thousand years back, on this sacred day, (i.e. on வளர் பிறை சித்திரை திங்கள் பஞ்சமி திதி திவாதிரை நக்ஷத்திர நன்னாளில்), none other than the Holy श्री आदि शेष (śrī ādi śeṣa) who is considered as one of the main नित्यसूरि (nityasūri – eternal seer / thinker), incarnated as परमाचार्य श्री रामानुजाचार्य (paramācārya śrī rāmānujācārya). Please recollect that लक्ष्मण (lakṣmaṇa) & बलराम (balarāma) were also his अव्तार रूप (avtāra rūpa – incarnational forms) in the त्रेतायुग (tretāyuga) & द्वापर युग (dvāpara yuga) respectively. In fact, the name रामानुजा (rāmānujā) literally means "இராமனின் தம்பி (iraamanin thambi - Rama’s younger brother)" i.e. it refers to लक्ष्मण (lakṣmaṇa). Interestingly, based on his birth chart, the saint’s இயர் பெயர் (iyar peyar – original name) was "இளையாழ்வான் (ilaiyaazhvaan – younger lord)" and this name was conferred to him by பெரிய திருமலைநம்பி / श्री शैलपूर्ण (periya thirumalai nambi / śrī śailapūrṇa)

In other words, श्री रामानुजाचार्य (śrī rāmānujācārya) was not just a मुक्तात्म (muktātma – evolved / liberated soul) but he in reality was a नित्यसूरि (nityasūri – eternal seer / thinker) disguised in human form, in order to help humanity get liberated from its viscous cycle of mundane phenomenal life and attain final emancipation at the Holy Feet of God. Technically, a नित्यसूरि (nityasūri – eternal seer / thinker) is one who is an ever-green seer of spiritual wisdom. In other words, He is a सदा पश्यन्ति सूर्यः (sadā paśyanti sūryaḥ - seer who always sees), as explained in the sacred ऋग्वेद मन्त्र (ṛgveda mantra)



तद् विष्णोः परमं पदं सदा पश्यन्ति सूर्यः दिवीव चक्षुराततम्।
तद्विप्रासो विपन्यर्वो जागृवांसः समिन्धते विष्णोर्यत्परमं पदम्॥
(
tad viṣṇoḥ paramaṁ padaṁ sadā paśyanti sūryaḥ divīva cakṣurātatam|
tadviprāso vipanyarvo jāgṛvāṁsaḥ samindhate viṣṇoryatparamaṁ padam||

Just as the sun’s rays in the sky are extended to the mundane vision, so in the same way the wise and learned devotees always see the supreme abode of Lord Vishnu
Because those highly praiseworthy and spiritually awake devotees are able to see the spiritual world, they are also able to reveal that supreme abode of Lord Vishnu.
)


His Holiness श्री रामानुजाचार्य (śrī rāmānujācārya) gifted us the विशिष्टाद्वैत वेदान्त महादर्शन (viśiṣṭādvaita vedānta mahādarśana - supreme philosophy of qualified non-duality) one of the three main वेदान्त दर्शन (vedānta darśana - vedantic philosophies). Its core philosophy is summarized by in the following passage from वेदार्थ संग्रह (vedārtha saṁgraha) :
“This is the fundamental relationship between the Supreme and the universe of individual selves and physical entities. It is the relationship of soul and body, the inseparable relationship of the supporter and the supported, that of the controller and the controlled, and that of the principal entity and the subsidiary entity. That which takes possession of another entity entirely as the latter’s support, controller and principal, is called the soul of that latter entity. That which, in its entirety, depends upon, is controlled by and subserves another and is therefore its inseparable mode, is called the body of the latter. Such is the relation between the individual self and its body. Such being the relationship, the supreme Self, having all as its body, is denoted by all terms”

Unlike श्री आदि शंक्राचार्य (śrī ādi śaṁkrācārya) who wrote भाष्य (bhāya - commentaries) on all the प्रस्थान त्रयी (prasthāna trayī – triple sources), श्री रामानुजाचार्य (śrī rāmānujācārya) did not write भाष्य (bhāya - commentaries) on the उपदेश श्रुति प्रस्थान (upadeśa śruti prasthāna – injunctive revelatory sources) i.e. the दसोपनिषद् (dasopaniṣad). However, he wrote exhaustive commentaries on the remaining two sources given below. In fact, as a mark of respect, he is honored with the title भाष्यकार (bhāṣyakāra – the commentator) 

  • श्री भाष्य (śrī bhāṣya – sacred commentary) on the बादरायण ब्रह्म सूत्र (bādarāyaṇa brahma sūtra) which is न्याय युक्ति प्रस्थान (nyāya yukti prasthāna – deliberative / logical instrument sources). He also gifted us the following abridged commentaries वेदान्तसार (vedāntasāra), वेदान्त दीप (vedānta dīpa)
  • गीत भाष्य (gīta bhāṣya) commentary on श्रीमद् भगवद्गीता (śrīmad bhagavadgītā) which is the साधन प्रस्थान (sādhana prasthāna – procedural / practitioner sources)



.He is also the "पूर्वाचार्य / பிரதான ஜீயர் (pūrvācārya / piradhaana jIyar)" who formally established the श्री वैष्णव मत संप्रदाय (śrī vaiṣṇava mata saṁpradāya - Sri Vaishnava theological tradition). He is also a bridge-builder not only between the Sanskrit scriptures like वेद शास्त्र (veda śāstra) & वैष्णव आगम शास्त्र (vaiṣṇava āgama śāstra), particularly the पाञ्चरात्र आगम (pāñcarātra āgama) on the one hand, but also integrating with the sacred நாலாயிரத் திவ்வியப் பிரபந்தம் (naalaayiRa dhivappirabandham – four thousand sacred compositions) containing the devotional mystic ஆழ்வார் பாசுரங்கள் (aazhvaar paasurangaL). In fact, he was especially very attached to கோதை ஸ்ரீ ஆண்டாள் நாச்சியாரின் திருப்பாவை (kOdhai sri aaNdaaL naachchiyaarin thiruppaavai) and hence was even called "திருப்பாவை ஜீயர் (thiruppaavai jIyar)".

Moreover, according to him, both these Sanskrit scriptures and Tamil scriptures are two sides of the same coin and hence called them उभय वेदान्त (ubhaya vedānta). 

Because of his magnanimous compassion for the whole of humanity, श्री रामाणुजचार्य (śrī rāmāṇujacārya) is also lovingly adored as "எம்பெருமான் (emperumaan – our lord)". According to the biography of श्री रामाणुजचार्य (śrī rāmāṇujacārya), the revered saint and preceptor திருகச்சி நம்பிகள் (thirukachchi nambigaL) had instructed his beloved disciple श्री रामाणुजचार्य (śrī rāmāṇujacārya) to meet திருகோஷ்டியூர் நம்பிகள் (thiru koshtiyUr nambigaL) and formally seek अष्टाक्षर महा मन्त्र दिक्ष (aṣṭākṣara mahā mantra dikṣa – induction into the sacred eight syllable mantra) from the समयाचार्य (samayācārya – religious preceptor). Accordingly,श्री रामाणुजचार्य (śrī rāmāṇujacārya) received the sacred initiation from திருகோஷ்டியூர் நம்பிகள் (thiru koshtiyUr nambigaL) who also warned him that this "मोक्षमन्त्र (mokṣa mantra – hymn of liberation)" was a great रहस्य (rahasya - secret) and not to be shared with everybody, as it is said  "गुह्यानां गुहामुतमं (guhyānāṁ guhāmutamaṁ - this is to be highly guarded amongst all mantras to be guarded)", failing which he would be committing a serious blasphemy and hence will be condemned to hell . However, in spite of such strict warnings, the all-merciful श्री रामाणुजचार्य (śrī rāmāṇujacārya), decided to share this मोक्षमन्त्र (mokṣa mantra – hymn of liberation) to the general public, He did not want to confine the benefits of such a powerful spiritual treasure to himself or to a specific clan but wanted everyone to equally benefit by it and attain मोक्ष (mokṣa - liberation) even at the personal risk of going to hell for disobeying his master’s instructions. Thinking thus, this noblest of noble saint climbed up the கோயில் இராஜ கோபுரம் (kOyil iraja kOpuram – royal temple- tower) of the sacred திருகோஷ்டியூர் திவ்ய தேச ஷேத்திரம் (thirukOttiyUr dhivya dhEsa kshEththiram) and summoned all the people in and around the town and to the benefit of everyone, loudly delivered the मूलमन्त्र / பெரிய திருமந்திரம் (mūlamantra / periya thirumandhiram – root sonic formula)
ஸ்ரீ மணவாள மாமுனிகள் (maNavaaLa maamunigaL) in his famous anthological masterpiece called  "உபதேச இரத்தின மாலை (upadhEsa iraththina maalai)", he further glorifies the compassion of எம்பெருமான் (emperumaan – our lord) as follows:

ஓராண்வழியாய் உபதேசித்தார் முன்னோர்
யேரார் எதிராசர் இன்னருளால் பாருலகில்
ஆசையுடையோர்க்கெல்லாம் ஆரியர்காள்
கூருமென்று பேசி வர்ம்பருத்தார் பின்.
(
OraaNvazhiyAy upathEsiththaar munnOr,
eraar ethiraasar innaruLaal - paarulagil
aasaiyudaiyOrkkellam aariyarkaaL kooRumenRu
pEsi varambaruththaar pin

Before EmperumAnAr's time, all the poorvAchAryALs instructed the rahasyArthams of Sri Viashnavaa doctrines in a sequential manner to their successors one at a time. EmperumAnAr, who came later in that chain of AchAryAs out of his immense mercy addressed all of those, who took refuge at his sacred feet and removed that limitation in instruction route and gave permission for his sishyAs to teach the rahasyArthams to every one eager to know about them.
)

You might be wondering why the मूलमन्त्र (mūlamantra – root sonic formula) which is first among the त्रय मन्त्र (traya mantra – triple hymns) is considered a रहस्य (rahasya - secret). Well, this is because, traditionally, these were maintained as a closely guarded secret within the tradition and only formally shared by a qualified समयाचार्य (samayācārya – religious preceptor) to his deserving शिष्य (śiṣya - disciple) who has obtained necessary समय दीक्ष (samaya dīkṣa – formal induction) into the आचार्य परंपर (ācārya paraṁpara). This was the norm in practice for thousands of years, till the dawn of His Holiness श्री रामाणुजचार्य (śrī rāmāṇujacārya) lovingly adored as "எம்பெருமான் (emperumaan – our lord)", who out of his compassion for the whole of humanity, took a more lenient stand and democratized the tradition slightly, of course without compromising on the original sanctity of the tradition and that is why he is adored by ஸ்ரீ மணவாள மாமுனிகள் (maNavaaLa maamunigaL) in his ஆர்த்தி பிரபந்தம் (aarththi pirabandham) as 

மறையதனில் பொருளனைத்தும் வாய்மொழிந்தான் வாழியே
மாறனுறை செய்த தமிழ் மறை வளர்த்தோன் வாழியே

Thursday, April 19, 2018

श्री आदि शंकरचार्य जयन्ति (śrī ādi śaṁkaracārya jayanti)

जय जय शङ्कर  हर हर शङ्कर॥
(jaya jaya śaṅkara  hara hara śaṅkara॥

)





श्री गुरुभ्यो नमः (śrī gurubhyo namaḥ - salutations to the guru)


Today is the sacred महा अवतार जयन्ति (mahā avatāra jayanti - sacred incarnation anniversary) of His Holiness जगत् गुरु श्री आदि शंकराचार्य भगवर्पाद (jagat guru śrī ādi śaṁkarācārya bhagavarpāda). He is one of the noblest of saintly gurus who walked on earth. He is aptly respected as the जगत् गुरु (jagat guru - universal preceptor) because of his unparalleled contribution to universal religio-spiritual heritage. To quote Swami Vivekananda “India has to live, and the spirit of the Lords descended again. He who declared, "I will come whenever virtue subsides", came again, and this time the manifestation was in the South, and up rose that young brahmin of whom it has been declared that at the age of sixteen he had completed all his writings; the marvelous boy Shankaracharya arose. The writings of this boy of sixteen are the wonders of the modern world, and so was the boy. He wanted to bring back the Indian world to its pristine purity, but think of the amount of the task before him…. The greatest teacher of the Vedanta philosophy was Shankaracharya. By solid reasoning he extracted from the Vedas the truths of Vedanta, and on them built up the wonderful system of Jnana that is taught in his commentaries. He unified all the conflicting descriptions of Brahman and showed that there is only one Infinite Reality. He showed too that as man can only travel slowly on the upward road, all the varied presentations are needed to suit his varying capacity."
On this sacred day, I am reminded of the following verses often quoted by the Holy Sage of Kanchi, His Holiness ஸ்ரீ மஹா பெரியவா (sri mahaa periyavaa)

शास्त्रं शरीर मीमांसा देवस्तु परमेश्वरः।
आचार्यः शङ्कराचार्यः सन्थु मे जन्मानि जन्मानि॥
(
śāstraṁ śarīra mīmāṁsā devastu parameśvaraḥ|
ācāryaḥ śaṅkarācāryaḥ santhu me janmāni janmāni||
If, in every future birth, the sheer anchor of my faith and understanding is the religion of the Upamshads, If the God I worship is Parameshvara Himself, if the Guru who wil be my refuge is Sri Sankaracharya, it does not matter how many births I am to take. May these three be granted to me life after Life.
)

Yes, श्री आदि शंक्राचार्य (śrī ādi śaṁkrācārya) was one of the earliest pioneers in उत्तर मीमांस महा वेदान्त दर्शन (uttara mīmāṁsa mahā vedānta darśana) who gifted us with the philosophical treasure-house viz. केवल अद्वैत महा दर्शन (kevala advaita mahā darśana - supreme revelation of the absolute non-dualistic philosophy) very emphatically establishing that the सत्चितानन्द परब्रह्मन् (satcitānanda parabrahman – Omnipresent- Omniscient -Omnipotent Absolute Divinity) is the one and only नित्य कैवल्य सत्य (nitya kaivalya satya - eternal absolute reality). In other words, God is the ultimate all-inclusive reality. To borrow Swami Vivekananda's famous verses - "Each soul is potentially divine" and "Religion is the manifestation of (this potential) divinity already in man." Thus, श्री आदि शंक्राचार्य (śrī ādi śaṁkrācārya) established the inherent divinity in all phenomenal manifestation reflecting the wisdom of the महा वाक्य (mahā vākya - supreme declaration), as revealed in the Vedic Corpus

  • तत् त्वम् असि (tat tvam asi - thou art that)
  • अयम् आत्मा ब्रह्म (ayam ātmā brahma - this self is God)
  • अहं ब्रह्मास्मि (ahaṁ brahmāsmi - I am Divine)
  • प्रज्ञानम् ब्रह्म (prajñānam brahma – God is absolute wisdom)


In fact, in the small treatise वाक्य वृत्तिः (vākya vṛttiḥ), the आचार्य (ācārya - preceptor) preaches the spiritual significance of महा वाक्य (mahā vākya - supreme declarations) especially on तत् त्वम् असि (tat tvam asi - thou art that) & अहं ब्रह्मास्मि (ahaṁ brahmāsmi - I am Divine)
In a nutshell, श्री आदि शंक्राचार्य (śrī ādi śaṁkrācārya) helped drive home the spiritual message of Universal Divinity irrespective one’s caste, creed, religion, nationality etc. The following verses from his मनिषा पञ्चकम् (maniṣā pañcakam – five fold considerations) very clearly highlights his universal non-dualistic outlook.

जाग्रत्स्वप्न सुषुप्तिषु स्फुटतरा या संविदुज्जृम्भते
या ब्रह्मादि पिपीलिकान्तथनुषु प्रोथा जगत् साक्षिणी।
सैवाहं न च दृश्य वस्त्विति दृढप्रज्ञाऽपि यस्य अस्ति चेत्
चण्डालोऽस्तु स तु द्विजोऽस्थु गुरुरित्यषा मनीषा मम॥
ब्रह्मैवाहमिदं जगच्च सकलं चिन्मात्र विस्तारितं
सर्वं चैतदविद्यया त्रिगुनयाऽशेषं मया कल्पितम्।
इत्थं यस्य दृढा मतिः सुखतरे नित्ये परे निर्मले
चण्डालोऽस्तु सतु द्विजोऽस्तु गुरुरित्यषा मनीशा मम॥
(
jāgratsvapna suṣuptiṣu sphuṭatarā yā saṁvidujjṛmbhate
yā brahmādi pipīlikāntathanuṣu prothā jagat sākṣiṇī|
saivāhaṁ na ca dṛśya vastviti dṛḍhaprajñā'pi yasya asti cet
caṇḍālo'stu sa tu dvijo'sthu gurur ityaeṣā manīṣā mama||
Oh! Let’s learn that the indwelling (pratyag) atman is distinctly shining with in all the three states; namely the wakeful, the dreaming and the deep sleep states. It is the invisible thread embedded in us and it is the witness with in all from the Creator up to the tiny ant. It is not a cognizable object in spite of any amount of material intelligence. It is very much the same in one and all irrespective of any caste, creed or kind! My firm understanding is that the great one who inculcates this concept is the real preceptor.
I am none other than a part and parcel of the Brahman (The Absolute). I am dwelling on the pure and infinite Brahman and I am the very Brahman. This universe is glittering with infinite glow by the power of the chaitanya or unlimited sentient energy of the Absolute. Apparently the universe is assumed (by us) to consist of diverse and different things, due to (our) ignorance (avidya or nescience) borne out of the three gunas (Sattva, Rajas and Tamas). He who firmly believes with perfect understanding of this unity in diversity, for me, he is the adorable great Master, irrespective of whether he is a Brahmin or an outcaste. This is my perfect understanding.
)

Moreover, according to श्री आदि शंक्राचार्य (śrī ādi śaṁkrācārya), it is our अविद्या (avidya -ignorance) that hides our Divine potential and limits us to the confines of अहंकार (ahaṁkāra - self arrogation) leading to the disparities between अहं (ahaṁ - self / subject) & इदं (idaṁ - non-self / object).
In my humble opinion, श्री आदि शंक्राचार्य (śrī ādi śaṁkrācārya) is truly a जगत् गुरु (jagat guru - universal preceptor) in this sense as well. He helped us realize that all kinds of disparities are temporary and unity is the permanent reality. With the dawn of spiritual enlightenment (wisdom), differences across all phenomenal manifestations across the world can potentially be integrated into the कैवल्य अद्वैत एकत्वम् (kaivalya advaita ekatvam - absolute non dual singularity). Interestingly, recent discoveries in modern physics also echoes a similar concept of absolute cosmic singularity.
Of course his contribution to spirituality does not end here. He is also one of the greatest pan-Indian holistic synthesizers of heterogeneous theological / philosophical schools viz. वैदीक (vaidīka - vedic), तान्त्रिक (tāntrika - tantrik), आगम (āgama - agamic), पुराण (purāṇa - mythological) etc. into a homogeneous system of Hindu philosophy. He also wisely incorporated the learning and best practices from योग (yoga), सांक्य (sāṁkya), वैशेषिक (vaiśeṣika), न्याय (nyāya), पूर्व मीमांस (pūrva mīmāṁsa), उत्तर मीमांस (uttara mīmāṁsa), as well as ,help in a two way wisdom adoption with (both from & to) other popular heterodox religions of his times - Buddhism, Jainism etc., into mainstream Hinduism. To quote Dr. Sarvepalli S Radhakrishnan, "Sankara present to us the true ideal of philosophy, which is not so much knowledge as wisdom, not so much logical learning as spiritual freedom. For Sankara, as for some of the greatest thinkers of the world like Plato and Plotinus, Spinoza and Hegel, Philosophy is the austere vision of eternal truth, majestic in its freedom from the petty cares of man's paltry life. Through the massive and at the same time subtle dialectic of Sankara there shows forth a vivid, emotional temperament, without which philosophy tends to become a mere game of logic. A master of the strictest logic, he is also master of a noble and animated poetry which belongs to another order. The rays of his genius have illumined the dark places of thought and soothed the sorrows of the most forlorn heart. While his philosophy fortifies and consoles many, there are, of course, those to whom it seems to be an abyss of contradiction and darkness. But whether we agree or differ, the penetrating light of his mind never leaves us where we were....Sankara appeared, at one and the same time, as an eager champion of the orthodox faith and a spiritual reformer. He tried to bring back the age from the brilliant luxury of the Puranas to the mystic truth of the Upanishads. The power of the faith to lead the soul to the higher life became for him the test of its strength. He felt impelled to attempt the spiritual direction of his age by formulating a philosophy and religion which could satisfy the ethical and spiritual needs of the people".
He also helped in consolidating the huge corpus of Vedic scriptures and streamlining their underlying philosophic essence by writing भाश्य (bhāśya - commentaries) on the प्रस्थान त्रयी (prasthāna trayī – triple sources) of orthodox Hindu scriptures viz.
  • दसोपनिषद् (dasopaniṣad) as the उपदेश श्रुति प्रस्थान (upadeśa śruti prasthāna – injunctive revelatory sources)
  •  ब्रह्म सूत्र (brahma sūtra) as the न्याय युक्ति प्रस्थान (nyāya yukti prasthāna – deliberative / logical instrument sources) &
  •  श्रीमद् भगवद्गीता (śrīmad bhagavadgītā) as the साधन प्रस्थान (sādhana prasthāna – procedural / practitioner sources) respectively.


Again, through his दिग्विजय यात्र (digvijaya yātra – pilgrimage to conquer the four directions) by travelling across the length and breadth of भारतव्रश (bhāratavraśa – Indian sub-continent) including the four directional corners of India viz. चार् धाम् (cār dhām – four abodes). Eventually, he is known to have established आम्नाय विद्यामठ (āmnāya vidyāmaṭha – traditional / orthodox monastic schools) across India. He then formally designated chosen four of his principle disciples, entrusting them the responsibility of heading and manage these establishments.

  • गोवर्धन पिठं (govardhana piṭhaṁ) as the पूर्व आम्नाय (pūrva āmnāya – eastern tradition) at जगन्नाथ् पूरि (jagannāth pūri) in Orissa headed by आचार्य पद्मपाद (ācārya padmapāda) as its first प्रथम पीठाधिपति (prathama pīṭhādhipati – first chairperson)
  •  श्री शारदा पीठं (śrī śāradā pīṭhaṁ) as the दक्षिन आम्नाय (dakṣina āmnāya – southern tradition) at शृङ्गेरी śṛṅgerī) in Karnataka, headed by सुरेश्वराचार्य (sureśvarācārya) as its first प्रथम पीठाधिपति (prathama pīṭhādhipati – first chairperson).
  •  द्वारक पीठं (dvāraka pīṭhaṁ) as the पश्चिम आम्नाय (paścima āmnāya – western tradition) at द्वारक dvāraka) in Gujarat, headed by हस्तामलकाचार्य (hastāmalakācārya) as its first प्रथम पीठाधिपति (prathama pīṭhādhipati – first chairperson)
  •  ज्योतिर्मठ्पीठं (jyotirmaṭh pīṭhaṁ) as the उत्तर आम्नाय (uttara āmnāya – northern tradition) in Uttarkhand headed by तोटकाचार्य (toṭakācārya) as its first प्रथम पीठाधिपति (prathama pīṭhādhipati – first chairperson.
Each मठ (maṭha - monastery) corresponds to one of the four वेद संहित संप्रदाय (veda saṁhita saṁpradāya) viz. ऋग् वेद (ṛg veda), यजुर् वेद (yajur veda), साम वेद (sāma veda) & अथर्व वेद (atharva veda) respectively. Having established the four monasteries, श्री आदि शंक्राचार्य (śrī ādi śaṁkrācārya) himself became the प्रथम पीठाधिपति (prathama pīṭhādhipati – first chairperson) of the श्री काञ्ची कामकोटि पीठं (śrī kāñcī kāmakoṭi pīṭhaṁ) which is considered as the सर्व ज्ञान पिठ (sarva jñāna piṭha – throne of omniscience).

By establishing these monastic orders श्री आदि शंक्राचार्य (śrī ādi śaṁkrācārya) also played a pivotal role in integrating the pan Indian cultural belief systems across Hindus into common identity as one religion - Hinduism. Thus, in terms of theological contribution he plays the unparalleled role of analyzing the inherent polytheistic nature of Hindu DNA and formally consolidating the most popular theologies into an integrated into षण्मत देवत संप्र्दाय(ṣaṇmata devata saṁprdāya - sixfold theological deity tradition) viz. शैवं (śaivaṁ), शाक्तं (śāktaṁ), कौमारं / स्कन्दं (kaumāraṁ / skandaṁ), गणपत्यं / वैनायकं (gaṇapatyaṁ / vaināyakaṁ),वैष्णवं (vaiṣṇavaṁ) & सौरं (sauraṁ) thereby establishing the स्मार्त संप्र्दाय (smārta saṁprdāya) and paving the way for inter-faith harmony and removing theological sectarian disputes within Hinduism. In fact, he is rightly eulogized as निखिलपाषण्डषण्डकण्टकोत्पाटनेन विशदिकृत्वेदवेदान्तमार्गषण्मतप्रतिष्टाप्काचार्याः। (nikhilapāṣaṇḍaṣaṇḍakaṇṭakotpāṭanena viśadikṛtvedavedāntamārgaṣaṇmatapratiṣṭāpkācāryāḥ|)

In simple words, he established that the one and only निर्गुण परब्रह्म (nirguṇa parabrahma) as the सगुण परमेश्वर (saguṇa parameśvara) reveals Himself in multiple theological नाम (nāma - name), रूप (rūpa - form), कल्याण गुण (kalyāṇa guṇa – auspicious qualities) & पुराण (purāṇa - mythology)
His own life and works serve as the greatest testimony to his non-sectarian & truly secular theological ideology. For example in his devotional mystical renderings he has impartially worshiped and eulogized all the principle deities listed above. He eulogized महा विष्णु (mahā viṣṇu) through his famous मोह मुद्गर (moha mudgara) - more popularly identified by its opening verses भज गोविन्दम् (bhaja govindam - chant Govinda)", wherein, he refers to the same परब्रह्म (parabrahma – supreme divinity) that he glorifies as "परमशिव (paramaśiva)" in शिवानन्द लहरी (śivānanda laharī) which in turn is the same परब्रह्म (parabrahma – supreme divinity), now glorified as "पराशक्ति (parāśakti)" in सौन्दर्य लहरी (saundarya laharī) and as "षण्मुख (ṣaṇmukha)" in his श्री सुब्रमण्य भुजङ्गम् (śrī subramaṇya bhujaṅgam). This is another feather in his cap and that is why he is adored as

निखिलपाषण्डषण्डकण्टकोत्पाटनेन विशदिकृदवेदवेदान्तमार्गषण्मतप्रतिष्टापकचार्याः।
(nikhilapāṣaṇḍaṣaṇḍakaṇṭakotpāṭanena viśadikṛdavedavedāntamārgaṣaṇmatapratiṣṭāpakacāryāḥ|-
one who swept of the thorns that encumbered the various forms of worship of the six manifestations of God).


Moreover in my humble opinion, he  also deserves to be called as the Father figure playing the role of the original seed of पवित्र वटवृक्ष वेदान्त दर्शनस्य (pavitra vaṭavṛkṣa vedānta darśanasya - Holy Banyantree of final philosophical wisdom) from which all other branches and even other genetically mutated Vedantic seeds evolved eventually, just as one biological species evolves from another species eventually. For example, the sacred विशिष्टाद्वैत दर्शन (viśiṣṭādvaita darśana - doctrine of qualified nonduality) of श्री रामानुजाचार्य (śrī rāmānujācārya) & द्वैत दर्शन (dvaita darśana - doctrine of duality) are but honorable examples of such philosophical evolution. Although there could be many ideological differences between these schools and the one of Shankara, yet he has laid the common foundation stone.
We can compare this with the evolution of modern physics wherein the contribution of one scientists leads to the other. For example, Sir Isaac Newton's revolutionary theories on the laws of mechanics and gravity are his humble learning and respectful deviations from the works of his predecessors like Aristotle, Rene Descartes, Galileo Galilee, and Johannes Kepler etc... In fact, Newton himself acknowledges this when he humbly admits “I have seen farther other men, it is because I have stood on the shoulders of giants” Similarly, Albert Einstein made his astounding discoveries of Relativistic physics standing on the shoulders of Newton.
You might argue that these schools are fundamentally contradicting with each other as one talks about monism, while other qualified monism and the third complete duality. How can we say they have a common ground? Well if you think deeply u can find the common thread tying all these doctrines together. Of course one may have to deep dive into their philosophies to see the common truth underlying the apparent differences. Here is my two cents for you.
श्री आदि शंक्राचार्य (śrī ādi śaṁkrācārya) very carefully worded his school of philosophy as अद्वैत दर्शन (advaita darśana - non-dualistic philosophy) and not as एकत्व दर्शन (ekatva darśana - monistic philosophy). In other words, द्वैत (dvaita - duality) is hidden parameter in the philosophy of अद्वैत (advaita - nonduality) disguised as the अनिर्वचनीय माया (anirvacanīya māyā – ineffable /indeterminable mystery) and hence द्वैत (dvaita - duality) and विशिष्टाद्वैत (viśiṣṭādvaita - qualified non duality) are potentially derivable from it. This is a very important point for us to understand and appreciate the genius in श्री आदि शंक्राचार्य (śrī ādi śaṁkrācārya).

Thus, on this eventful day of his महा अवतार जयन्ति (mahā avatāra jayanti - sacred incarnation anniversary) I feel blessed in contemplating on his life and contribution to spirituality I offer my humble salutations at his holy feet recollecting the golden verses

श्रुति स्मृति पुराणानां आलयं करुणालयं।
णमामि भगवत्पादं शन्करं लोक शन्करं।
ष्रिमछन्कर भगवद्पाद सद्गुरुभ्यो नमः॥
(
śruti smṛti purāṇānāṁ ālayaṁ karuṇālayaṁ|
ṇamāmi bhagavatpādaṁ śankaraṁ loka śankaraṁ|
ṣrimachankara bhagavadpāda sadgurubhyo namaḥ||
I Salute Shankara Bhagavat Pada,
the bestower of blessedness on the world,
the repository of all the wisdom that is contained in the sacred texts,
and the incarnation of grace.