The Religion and Philosophy of the Veda and Upanishads v2.c40.s2.34

v2.c40.s2.34

With these the list of important Upaniṣads closes: but the manufacture of these works went on indefinitely down even to modern times. The later Upaniṣads claimed connexion with the Atharvaveda, and it is probable that the Muṇḍaka and the Praçna were really so connected: the others had no real bond of union, but were pleased to assume one for their own purposes. These Upaniṣads fall into four classes, according as they (1) merely develop doctrines already found in the older Upaniṣads; or (2) devote themselves to the glorification of the Yoga practices, by which religious ecstasy was produced; or (3) deal with the condition of the Sannyāsin; or (4) finally give themselves up to the glorification of Rudra-Çiva.