Sanskrit (romanised) · Chāndogya Upaniṣad (Sanskrit, IAST)
yadā vai śraddadhāty atha manute nāśraddadhan manute śraddadhad eva manute śraddhā tv eva vijijñāsitavyeti śraddhāṃ bhagavo vijijñāsa iti
English · F. Max Müller
'When one believes, then one perceives. One who does not believe, does not perceive. Only he who believes, perceives. This belief, however, we must desire to understand.' 'Sir, I desire to understand it.'