In Mandaeism, Hayyi Rabbi or Heyyi Rabbi (; ), 'The Great Living God', is the supreme God from which all things emanate.
Hayyi Rabbi is also known as the "First Life", since during the creation of the material world, Yushamin emanated from Hayyi Rabbi as the 'Second Life'. According to Qais Al-Saadi,
Mandaeans recognize God to be the eternal, creator of all, the one and only in domination, who has no partner. "God is worshiped alone and praised as the Supreme Force of the universe. He presides over all the worlds and all of creation." In Mandaeism, is the belief in One God (cf. Middle Aramaic (sÃÂhdutÃÂ) "testimony").
Hayyi Rabbi is also referred to in Mandaean scriptures as:
Other names used are:
Kuà ¡á¹Âa ('Truth', ) is also another name for Hayyi Rabbi, as well as Pará¹£upa Rba ('Great Immanence, Great Countenance'). In the Ginza Rabba (in Right Ginza books 1 and 2.1), the divine countenance of Hayyi Rabbi is referred to as the "Great Countenance of Glory" ( , ). In the Asut Malkia, a commonly recited Mandaean prayer, another name for Hayyi Rabbi is Aba Rba á¸Â-ÿqara ( 'Great Father of Glory').
According to E. S. Drower, the name Great Mind or Great Mana refers to the "over-soul" or "over-mind", the earliest manifestation of Hayyi, from which the soul of a human might be seen as a spark or temporarily detached part. In book three of the Right Ginza, Hayyi is said to have "formed Himself in the likeness of the Great Mana, from which He emerged".
Brikha Nasoraia writes:
Many Mandaean texts and prayers begin with the opening phrase b-à ¡umaihun á¸Â-hiia rbia (; ; ). It is similar to the basmala in Islam and the Christian Trinitarian formula).