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.
A conversation about what happens after death and who returns and who does not; then a teaching on breath as the chief thing in a person, and on how the gods and senses are held by it. Indra himself teaches Pratardana and speaks of himself in the first person.