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.
"The Little Knife" — a book about one exercise: attention, like a blade, cuts through what binds the soul to the body. It is called restraint, and what it cuts, in the end, is not the sinews, but desire.