The Upaniṣads — the philosophical core of the Vedic tradition, revealing the nature of Brahman, the Ātman, knowledge, action and liberation. The ten principal Upaniṣads together with select minor Vaiṣṇava Upaniṣads.
1Chapter 1 — Йога-кундалини-упанишада172 versesOn the sleeping power and how it is awakened: breath, three locks, sound, and the stages at which the mind ceases to wander. A practical book, describing khecarī and warning against extremes.