Upanishads are called Adhyatma Vidya (spiritual knowledge) or Brahma Vidya
as they convey the essence of the Veda teachings. They constitute that eternal
beacon which has been illuminating the creation right since its inception by its
undecayable, eternal and ever-relevant light. Its light contains that element of
immortality which has nurtured and nourished the very root of the Sanatana
dharma. It is a unique gift from India to the world for its eternal welfare.
There are believed to be ten Upanishads: Isha, Kena, Katha, Pashana, Mundaka,
Mandookya, Taittareya, Eitareiya, Chandogya and Brihadaaranyaka.