The text is attached to the Rig Veda, and is one of the 20 Sannyasa (renunciation) Upanishads. It is a short text and notable for its distilled, aphoristic presentation with metaphors and allegories. The Nirvana Upanishad describes the sannyasi (renouncer), his character and his state of existence as he leads the monastic life in the Hindu Ashrama tradition. The Upanishad is notable for not mentioning any rites of passage, qualifications or discussion of the sannyasi's life before renunciation. It just describes the Sannyasi, his external state, his inner state. The Upanishad asserts that the life of the sannyasi is of reflection, not rituals, dedicated to Jnana-kanda (knowledge section of the Vedas), finding home when he is in union with truth and perfection. Self-knowledge is his journey and destination, a solitary place his monastery of bliss.