Los Upaniṣads — el núcleo filosófico de la tradición védica, que revela la naturaleza de Brahman, el Ātman, el conocimiento, la acción y la liberación. Los diez Upaniṣads principales junto con Upaniṣads vaiṣṇavas menores selectos.
The story of the boy Naciketas, given by his father to Death and waiting three days at Yama's gate. Death gives him three boons and teaches: the body is a chariot, the intellect the driver, the senses the horses; the path is narrow as a razor's edge; and He is disclosed not by reasoning, but to whomever He Himself chooses.