Advaita VedantaAdvaita Vedanta
is probably the best known of all Vedanta schools. Advaita literally means "not two"; thus this is what we refer to as a monistic (or non-dualistic) system, which emphasises oneness. Its first great consolidator was Shankara
). Continuing the line of thought of some of the Upanishadic teachers, and also that of his own teacher Gaudapada, Shankara expounded the doctrine of Advaita - a nondualistic reality. By analysing the three states of experience (waking, dreaming and deep sleep) he exposed the relative nature of the world and established the supreme truth of the Advaita: the non-dual reality of Brahman in which atman (the individual soul) and brahman (the ultimate reality expressed in the trimurti) are identified absolutely.