Maharshi Glossary of Terms
The promoter of the A V is Adi Shankara.in the IXth century AD. He maintained that the sole reality is the universal spirit (Brahman) while the body and the physical world are simply maya (illusion).
People following the spiritual discipline aim at the liberation from the karma and thus avoiding reincarnation.
Upadesha - spiritual instruction, teahing given by Guru.