Sanskrit (romanised) · Chāndogya Upaniṣad (Sanskrit, IAST)
yadā vai nistiṣṭhaty atha śraddadhāti nānistiṣṭhañchraddadhāti nistiṣṭhann eva śraddadhāti niṣṭhā tv eva vijijñāsitavyeti niṣṭhāṃ bhagavo vijijñāsa iti
English · F. Max Müller
'When one attends on a tutor (spiritual guide), then one believes. One who does not attend on a tutor, does not believe. Only he who attends, believes. This attention on a tutor, however, we must desire to understand.' 'Sir, I desire to understand it.'