Vedānta  are  Dvaita  and  Viśishṭādvaita .  Advaita  (literally,  non-duality ) is a  monistic  system of thought. "Advaita" refers to the identity of the Self ( Atman ) and the Whole ( Brahman ). [ 2 ] The key source texts for all schools of  Vedānta  are the  Prasthanatrayi —the canonical texts