One of the six orthodox systems ( Hinduism .
Its three fundamental texts are the Upanishads , the Bhagavadgita , and the Brahma Sutras, which are very brief interpretations of the doctrine of the Upanishads. Several schools of Vedanta have developed, differentiated by their conception of the relationship between the self ( atman ) and the absolute ( Brahman ). They share beliefs in samsara and the authority of the Vedas as well as the conviction that Brahman is both the material and instrumental cause of the world and that the atman is the agent of its own acts and therefore the recipient of the consequences of action (see {{link=karma">karma ).