Advaita Vedanta, a major school of Hindu philosophy founded on the teachings of the Upanishads, Brahma Sutras, and Bhagavad Gita, with Adi Shankaracharya being its most prominent proponent, emphasizes the concept of non-duality (a- dvaita). It posits that the individual self (Atman) is identical to the ultimate reality (Brahman). The state of bondage is due to ignorance (avidya) of this identity. Liberation (Mukti or Moksha) is the realization of this true identity, which dispels ignorance. This realization is achieved through Gyana, or knowledge, specifically the discriminative knowledge of the self and the non-self, leading to the understanding of "Tat Tvam Asi" (That thou art).