Kaivalya Upanishad

It is classified as a Shaiva Upanishad, and survives into the modern times in two versions, one attached to the Krishna Yajurveda and other attached to the Atharvaveda. The Upanishad extols Shiva, aloneness and renunciation, describes the inner state of man in his personal spiritual journey detached from the world. The text is notable for presenting Shaivism in Vedanta, discussing Atman (Soul, Self) and its relation to Brahman, and Self-knowledge as the path to kaivalya (liberation).