Adi Shankara

Adi Shankara 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 - non-dual Brahman, in which Brahman is viewed as without attributes. He hailed from Kalady of present day Kerala.

Shankara travelled across India and other parts of South Asia to propagate his philosophy through discourses and debates with other thinkers. He is reputed to have founded four mathas ("monasteries"), which helped in the historical development, revival and spread of Advaita Vedanta. Adi Shankara is believed to be the organizer of the Dashanami monastic order and the founder of the Shanmata tradition of worship.

His works in Sanskrit concern themselves with establishing the doctrine of Advaita (Nondualism). He also established the importance of monastic life as sanctioned in the Upanishads and Brahma Sutra, in a time when the Mimamsa school established strict ritualism and ridiculed monasticism. Shankara represented his works as elaborating on ideas found in the Upanishads, and he wrote copious commentaries on the Vedic Canon (Brahma Sutra, Principal Upanishads and Bhagavad Gita) in support of his thesis. The main opponent in his work is the Mimamsa school of thought, though he also offers some arguments against the views of some other schools like Samkhya and certain schools of Buddhism that he was partly familiar with. He however held firmly that only Brahmin caste males are eligible to attain the knowledge of Brahman.

A well known verse, recited in the Smarta tradition, in praise of Adi Shankara is:

श्रुति स्मृति पुराणानामालयं करुणालयं|
नमामि भगवत्पादशंकरं लॊकशंकरं ||
Śruti smṛti purāṇānāṃālayaṃ karuṇālayaṃ|
Namāmi Bhagavatpādaśaṅkaraṃ lokaśaṅkaraṃ||
I salute the compassionate abode of the Vedas, Smritis and Puranas known as Shankara Bhagavatpada, who makes the world auspicious.

Adi Shankara begins his Gurustotram or Verses to the Guru with the following Sanskrit Sloka, that has become a widely sung Bhajan: