Sanskrit (romanised) · Chāndogya Upaniṣad (Sanskrit, IAST)
yadā vai manute 'tha vijānāti nāmatvā vijānāti matvaiva vijānāti matis tv eva vijijñāsitavyeti matiṃ bhagavo vijijñāsa iti
English · F. Max Müller
'When one perceives, then one understands. One who does not perceive, does not understand. Only he who perceives, understands. This perception, however, we must desire to understand.' 'Sir, I desire to understand it.'