(Sanskrit) Literally, non-duality. An ancient philosophical presentation of the nature of consciousness or Being that is "not-two," or not separate from its source: the Being itself.
The Advaita philosophy has been taught by many Hindu teachers, notably Adi Shankaracharya.
"The Advaita philosophy came millions of years before Jesus Christ." - Samael Aun Weor, The Zodiacal Course