ChU 7.17.1
यदा वै विजानात्य् अथ सत्यं वदति । नाविजानन् सत्यं वदति । विजानन्न् एव सत्यं वदति । विज्ञानं त्व् एव विजिज्ञासितव्यम् इति । विज्ञानं भगवो विजिज्ञास इति
yadā vai vijānāty atha satyaṃ vadati | nāvijānan satyaṃ vadati | vijānann eva satyaṃ vadati | vijñānaṃ tv eva vijijñāsitavyam iti | vijñānaṃ bhagavo vijijñāsa iti
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
'When one understands the True, then one declares the True. One who does not understand it, does not declare the True. Only he who understands it, declares the True. This understanding, however, we must desire to understand.' 'Sir, I desire to understand it.'
Translated by F. Max Müller