ADI SANKARACHARYA

                           
          Adi Shankara (788 CE - 821 CE?), also known as Śaṅkara Bhagavatpādācārya and Ādi Śaṅkarācārya, was an Indian philosopher who consolidated the doctrine of Advaita Vedanta, a sub-school of Vedanta. His teachings are based on the unity of the soul and Brahman, in other words non-dual Brahman, in which Brahman is viewed as without attributes. He hailed from Kalady of present day Kerala.
Birth and childhood

The birth place of Adi Shankara at Kalady

Adi Sankara Keerthi Sthampa Mandapam, Kalady, Kerala

                                               
                                         Shankara was born in the Nambudiri Brahmin community to Sri Sivaguru and Aryamba in or near Kaladi in central Kerala. According to lore, it was after his parents, who had been childless for many years, prayed at the Vadakkunnathan temple, Thrissur that Sankara was born under the star Thiruvathira.
His father died while Shankara was very young. Shankara's upanayanaṃ, the initiation into student-life, was performed at the age of five. As a child, Shankara showed remarkable scholarship, mastering the four Vedas by the age of eight.^[6]
 Sannyasa
From a young age, Shankara was inclined towards sannyasa, but it was only after much persuasion that his mother finally gave her consent.^[7] Shankara then left Kerala and travelled towards North India in search of a guru. On the banks of the Narmada River, he met Govinda Bhagavatpada, the disciple of Gaudapada. When Govinda Bhagavatpada asked Shankara's identity, he replied with an extempore verse that brought out the Advaita Vedanta philosophy. Govinda Bhagavatapada was impressed and took Shankara as his disciple.^[8]
The guru instructed Shankara to write a commentary on the Brahma Sutras and and propagate the Advaita philosophy. Shankara travelled to Kashi, where a young man named Sanandana, hailing from Chola territory in South India, became his first disciple. According to legend, while on his way to the Vishwanath Temple, Sankara came upon an untouchable accompanied by four dogs. When asked to move aside by Shankara's disciples, the untouchable replied: "Do you wish that I move my ever lasting Ātman ("the Self"), or this body made of flesh?" Realizing that the untouchable was none other than god Shiva himself, and his dogs the four Vedas, Shankara prostrated himself before him, composing five shlokas known as Manisha Panchakam.^[9][10]
At Badari he wrote his famous Bhashyas ("commentaries") and Prakarana granthas ("philosophical treatises").

 Meeting with Mandana Mishra                              

                        One of the most famous debates of Adi Shankara was with the ritualist Mandana Mishra. Madana Mishra's guru was the famous Mimamsa philosopher, Kumarīla Bhaṭṭa. Shankara sought a debate with Kumarīla Bhaṭṭa and met him in Prayag where he had buried himself in a slow burning pyre to repent for sins committed against his guru: Kumarīla Bhaṭṭa had learned Buddhist philosophy from his Buddhist guru under false pretenses, in order to be able to refute it. Learning anything without the knowledge of one's guru while still under his authority constitutes a sin according to the Vedas. Kumarīla Bhaṭṭa thus asked Adi Shankara to proceed to Mahiṣmati (known today as Mahishi Bangaon, Saharsa in Bihar) to meet Maṇḍana Miśra and debate with him instead.
                                After debating for over fifteen days, with Maṇḍana Miśra's wife Ubhaya Bhāratī acting as referee, Maṇḍana Miśra accepted defeat. Ubhaya Bhāratī then challenged Adi Shankara to have a debate with her in order to 'complete' the victory. She asked him questions related to sexual congress between man and woman - a subject in which Shankaracharya had no knowledge, since he was a true celibate and sanyasi. Sri Shankracharya asked for a "recess" of 15 days. As per legend, he used the art of "para-kaya pravesa" (the spirit leaving its own body and entering another's) and exited his own body, which he asked his disciples to look after, and psychically entered the dead body of a king. The story goes that from the King's two wives, he acquired all knowledge of "art of love". The queens, thrilled at the keen intellect and robust love-making of the "revived" King, deduced that he was not their husband, as of old.

                   The story continues that they sent their factotums to "look for the lifeless body of a young sadhu and to cremate it immediately" so that their "king" (Shankracharya in the king's body) would continue to live with them. Just as the retainers piled Shankracharaya's lifeless corpse upon a pyre and were about to set fire to it, Shankara entered his own body and regained consciousness. Finally, he answered all questions put to him by Ubhaya Bhāratī; and she allowed Maṇḍana Miśra to accept sannyasa with the        monastic name Sureśvarācārya, as per the agreed -upon rules of the debate.

Missionary tour

                      Adi Shankara then travelled with his disciples to Maharashtra and Srisailam. In Srisailam, he composed Shivanandalahari, a devotional hymn in praise of Shiva. The Madhaviya Shankaravijayam says that when Shankara was about to be sacrificed by a Kapalika, the god Narasimha appeared to save Shankara in response to Padmapada's prayer to him. As a result, Adi Shankara composed the Laksmi-Narasimha stotra.
              He then travelled to Gokarṇa, the temple of Hari-Shankara and the Mūkambika temple at Kollur. At Kollur, he accepted as his disciple a boy believed to be dumb by his parents. He gave him the name, Hastāmalakācārya ("one with the amalaka fruit on his palm", i.e., one who has clearly realised the Self).

      Next, he visited Śṛngeri to establish the Śārada Pīṭham and made Toṭakācārya his disciple.
After this, Adi Shankara began a Dig-vijaya (tour of conquest) for the propagation of the Advaita philosophy by controverting all philosophies opposed to it. He travelled throughout India, from South India to Kashmir and Nepal, preaching to the local populace and debating philosophy with Hindu, Buddhist and other scholars and monks along the way.
                  With the Malayali King Sudhanva as companion, Shankara passed through Tamil Nadu, Andhra Pradesh and Vidarbha. He then started towards Karnataka where he encountered a band of armed Kapalikas. King Sudhanva, with his Nairs, resisted and defeated the Kapalikas. They safely reached Gokarna where Shankara defeated in debate the Shaiva scholar, Neelakanta.
                     Proceeding to Saurashtra (the ancient Kambhoja) and having visited the shrines of Girnar, Somnath and Prabhasa and explaining the superiority of Vedanta in all these places, he arrived at Dwarka.

               Bhaṭṭa Bhāskara of Ujjayini, the proponent of Bhedābeda philosophy, was humbled. All the scholars of Ujjayini (also known as Avanti) accepted Adi Shankara's philosophy.
               He then defeated the Jainas in philosophical debates at a place called Bahlik Thereafter, the Acharya established his victory over several philosophers and ascetics in Kamboja (region of North Kashmir), Darada (Dabistan) and many regions situated in the desert and crossing mighty peaks, entered Kashmir. Later, he had an encounter with a tantrik, Navagupta at Kamarupa.