(Hebrew אהרון) In the books of Moses, the brother of Moses. Since Moses (משה) is a symbol of the Causal Body (the sephirah Tiphereth) which is related to the pineal gland, Aaron his brother represents the Mental Body (the sephirah Netzach), which is related to the brain. Aaron is the head of the tribe of Levi, which is related to the priesthood (magi), and the Kabbalistic triangle of the priesthood or magi-c: Netzach, Hod, Yesod.