Treatise on the Great Perfection of Wisdom, The ［大智度論］ ( Mahāprajnāpāramitā-shāstra; Chin Ta-chih-tu-lun;  Daichido-ron): A comprehensive commentary on the Great Perfection of Wisdom Sutra, traditionally attributed to Nāgārjuna (c. 150–250). The Sanskrit and Tibetan texts do not exist; only the Chinese version translated in 405 by Kumārajīva is extant. This work explains the concepts of prajnā, or wisdom, and shūnya, non-substantiality. Concerning religious practice, it sets forth the bodhisattva ideal, the six pāramitās, and other fundamental Mahayana concepts. The Treatise on the Great Perfection of Wisdom is also regarded as a treasury of Buddhist stories, such as those of the ascetic Aspiration for the Law, King Shibi, and King Universal Brightness. Primarily a commentary on the Great Perfection of Wisdom Sutra, it also incorporates concepts from the Lotus Sutra and other Mahayana sutras. It is highly valued as a reference in the general study of Mahayana thought.