The Upanishads are a vital thread in the evolution of Indian philosophy. Hindu philosophical thinking predates the Upanishads, dating back to the period of the Rig Veda. Even in the Rig Veda, issues about the genesis of the world and the origins of life are expressed. The sanctity of the Vedas is upheld by all six early orthodox traditions and philosophical schools. Despite the fact that Nyaya, Vaisheshika, Samkhya, and Yoga did not explicitly...