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.
Eighteen verses — the shortest of the principal upaniṣads. The world in it belongs to the Lord, and a person in it is a guest: "all this is clothed by the Lord; enjoy what He has set aside for you." Hence its rule of life: work without appropriating, hold knowledge and deed together, without choosing between them.