Nataraja Guru is the disciple-successor of Narayana Guru (1854-1928), whose dialectical revaluation and restatement of Sankaracarya’s Advaita Vedanta conformed for the first time to the requirements of a normative or experimental science, to the extent that will probably ever be possible. Sankara himself may be said to be a continuator of Vyasa, who in his turn revised and restated the wisdom of the Upanishads as understood in his time. Nataraja Guru is thus a representative of the same pure, direct and vertical line of succession of philosophical revaluators extending back through time to the most ancient phase of the recorded history of human thought. The Guru may thus be seen to be uniquely qualified to undertake the present work, which he did at the instance of Narayana Guru himself. Sent by Narayana Guru to study in the West, Nataraja Guru was awarded the D. Lit. degree from the University of Paris. In 1923 he established the Narayana Gurukula, with headquarters at Varkala in Kerala State, a Guru-disciple foundation which welcomes all who seek the wisdom of the Absolute in open and living terms. The Guru has translated into English and commented on all of the major works of Narayana Guru, and has written on a wide variety of subjects, employing throughout a protolinguistic or structural approach which could be said to be his unique contribution to the perennial wisdom heritage of mankind.