The Upanishads represent the loftiest heights of ancient Indo-Aryan thought and culture. They form the wisdom portion or Gnana-Kanda of the Vedas, as contrasted with the Karma-Kanda or sacrificial portion. In each of the four great Vedas known as Rik, Yajur, Sama and Atharva there is a large portion which deals predominantly with rituals and ceremonials, and which has for its aim to show man how b...