Sanskrit (romanised) · Chāndogya Upaniṣad (Sanskrit, IAST)
yadā vai sukhaṃ labhate 'tha karoti nāsukhaṃ labdhvā karoti sukham eva labdhvā karoti sukhaṃ tv eva vijijñāsitavyam iti sukhaṃ bhagavo vijijñāsa iti
English · F. Max Müller
'When one obtains bliss (in oneself), then one performs duties. One who does not obtain bliss, does not perform duties. Only he who obtains bliss, performs duties. This bliss, however, we must desire to understand.' 'Sir, I desire to understand it.'