Though there are many Mahavakyas, four of them, one from each of the four #Vedas, are often mentioned as “the Mahavakyas”.
According to the Vedanta tradition, the subject matter and the essence of all Upanishads are the same, and all the Upanishadic Mahavakyas express this one universal message in the form of terse and concise statements.
In later Sanskrit usage, the term mahāvākya came to mean “discourse”, and specifically, discourse on a philosophically lofty topic.
According to the Advaita Vedanta tradition, the four Upanishadic statements indicate the ultimate unity of the individual (Atman) with Supreme (Brahman).
