SREE AADI SANKARAACHARYA,THE LAST REFORMER OF HINDUISM,FROM THE EVIL AND ATHEISTIC CLUTCHES OF BUDDHISM. hE MADE THE FIRST FOUR HINDU MATT(MONASTRY) ON FOUR SIDES OF INDIA. HE WAS BORN IN AD 320 IN KALADY(NOW KOCHI INTERNATIONAL AIRPORT) IN A NAMBOOTHIRI BRAHMIN FAMILY.AND HAD MAHASAMADHI IN HIS AGE 18 OR 22. HE GIVE DEFENITION FOR BRAHMA SUTRA
Brahma, Vishnu and Siva, are three aspects of the Parabrahma or Parameswara, just as their wives, Saraswathi, Lakshmi and Parvati are aspects of Devi or Sakthi.
The Ancient Indian Gods do not go higher than this. Parameswara or Parabrahma is formless. In fact, it has no attributes at all. It is sometimes just called Tat or that. It is sometimes called Nirguna Brahma. You cannot pray to Nirguna Brahma. Since it is out of the reach of those who have and wishes or fears.
The way to Tat or Parameswara, is Santhi, calmness. Siva is also called Sankara, the one who causes Sam or peace. To be calm, you have to learn not to care about good luck or bad luck. Once you are indifferent, you will not care what happens or does not happen. Then you will be calm. Then Tat will come to you. You will then realise that everything including you is that Parabrahman, that Paramesvara, that supreme attribute less God. This will make you very very happy or Greatly Blissful (Brahma Ananda). See: Meditation as a way to God.
Indifference is called Vairagyam. The realisation that all is One is called Advaitam, or the lack of duality. The trick here is that first you must not be bothered by duality - like nice and not nice. That means you must practice Vairagyam first. Then you will get first peace (Santhi) and next Bliss (Ananda).
Adi Sankara and Kevala Advaita Vedanta: Sri Sankaracharya was an Ancient Indian who summarized the essence of Vedantic teachings into three concise sentences. These are:
“Brahma Satyam. Jagat Mithya. Jivo Brahmaiva Na Parah.”
Sankaracharya wrote a commentary on The Bhagavad Gita , which is a part of Vyasa’s Mahabharata. So Sankaracharya lived after Veda Vyasa. He also wrote commentaries on th Upanishads and Brahma Sutras. These three commentaires are called the prasthAna traya bhASyas.
Sankaracharya was a Namboodari Brahman from Kerala. He wrote many books including, Viveka Choodamani, Bhaja Govindam, and commentaries on the Bhagavad Gita and major Upanishads. He started 5 Mathas, all over India, where people could study and practice what he taught. He wrote the Soundarya Lahari in praise of the Devi. He wrote an explanation of the famous sentence from the Chandogya Upanishad – “Tat Tvam Asi”. That explanation is called Vakya Vritti.