Narada Muni-a pure devotee of the Lord, one of the sons of Lord Brahma, who travels throughout the universes in his eternal body, glorifying devotional service while delivering the science of bhakti. He is the spiritual master of Vyasadeva and of many other great devotees; A great sage among the demigods, the favorite son of Brahma, and one of the foremost authorities on visnu-bhakti. In Kali-santarana Upanisad, Brahma taught Narada the Hare Krsna maha-mantra. Narada is famous throughout the universe for his ecstatic chanting of the holy name of Krsna. He taught the Narada-pancaratra and the Narada-bhakti-sūtra and gives a number of illuminating discourses in Srimad-Bhagavatam and other Puranas. Among Narada's prominent disciples are Prahlada, Dhruva, Citraketu (Vrtrasura), the Haryasvas, and Vyasadeva, who compiled all the Vedic scriptures. See Bhakti-yoga, Brahma, Demigods, Prahlada, Vyasa. Nirvana-the cessation of material activities and existence, which according to Vaisnava philosophy, does not deny spiritual activities and existence; freedom from and the end of the process of materialistic life; Literally, of, or like, a candle extinguised. A Sanskrit term for deliverance from material identity or extinction of the false ego, nirvana is often identified with Buddhism. However, it is to be found throughout the Vedic literatures, e.g. in Bhagavad-gita 2.72, 5.24-26, and 6.15. See Buddhism, False ego, Liberation, Modes of nature.