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 code of renunciation, set out in order: who leaves home, when, and how; what ranks of the renounced there are; what they live on and what is forbidden them. It also examines difficult passages — including some we read differently.