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.
A three-part manual: the science of sound and pronunciation, the ladder of the five sheaths — from the body "made of food" to bliss — and a farewell to the graduate, put simply: "speak the truth, do your duty, let your mother be your god."