Nondualism, also called nonduality and nondual awareness, is a fuzzy concept originating in Indian philosophy and religion for which many definitions can be found, including: nondual awareness, the nonduality of seer and seen or nondifference of subject and object; the identity of conventional phenomena and ultimate reality, or the "nonduality of duality and nonduality"; metaphysical monism, the nonplurality of the world and "the interconnection of all things." It may also refer to a negation of dualistic thinking; and to the mystical unity with God or with Ultimate reality.