advaita

a Vedantic doctrine that identifies the individual self ( atman ) with the ground of reality ( brahman ) . It is associated especially with the Indian philosopher Shankara ( c. 788–820 ) .

Advaita Vedanta is a school of Hindu philosophy, and originally known as Puruṣavāda, is a classic system of spiritual realization in Hindu tradition. The term Advaita refers to its idea that the true self, Atman, is the same as the highest metaphysical reality of universe, Brahman. - Wikipedia