Advaita Vedanta is the classic and paradigmatic school of nondual philosophy. Put simply, the essential teaching is 'The Absolute (Brahman) is the only reality, the world (jagat) is an appearance (of that nondual Absolute) and the sentient being (jiva) is none other than the nondual Absolute'. The world of our daily experience is said to be a virtual reality within the field of consciousness. Realizing this will set us free from suffering - which is the goal of philosophy. This realization is attained through philosophical enquiry. There are various modes of such an enquiry, one of which is the 'Discernment of the Seer and the Seen' (Drg Drsya Viveka).