Explanation:

Advaita Vedanta is a type of Hinduism. People who believe in Advaita believe that their soul is never really different from God. The Sanskrit word for soul is Atman and the Sanskrit word for God is Brahman. The most famous Hindu philosopher who taught about Advaita Vedanta was Adi Shankara who lived in India more than a thousand years ago. Adi Sankara learned the sacred texts of Hinduism, like Vedas and Upanishads under his teacher Govinda Bhagavadpada and later wrote extensive commentaries of Hindu sacred texts called Upanishads. In these commentaries, he proposed the theory of Advaita, saying that the Upanishad actually teach that the individual soul (called Atman) is not different from God (called Brahman). He also taught that there is only one essential principle called Brahman (means God) and everything else is a kind of expression of that one Brahman. Because of this theory of one being, his teachings became popular as the "Advaita" (a = not, dvaita = two, means no-two or non-dual). The way he said this to people was "Atman is Brahman."