CHĀNDOGYA UPANISHAD · 4.14.2

भगव इति ह प्रतिशुश्राव ।
ब्रह्मविद इव सोम्य मुखं भाति ।
को नु त्वानुशशासेति ।
को नु मानुशिश्याद् भो इतीहापेव निह्नुते ।
इमे नूनम् ईदृशा अन्यादृशा इतीहाग्नीन् अभ्यूदे ।
किं नु सोम्य किल ते ऽवोचन्न् इति ॥

bhagava iti ha pratiśuśrāva ।
brahmavida iva somya mukhaṃ bhāti ।
ko nu tvānuśaśāseti ।
ko nu mānuśiśyād bho itīhāpeva nihnute ।
ime nūnam īdṛśā anyādṛśā itīhāgnīn abhyūde ।
kiṃ nu somya kila te ’vocann iti ॥

In time his teacher came back, and said to him: 'Upakosala.' He answered: 'Sir.' The teacher said: 'Friend, your face shines like that of one who knows Brahman. Who has taught you?' 'Who should teach me, Sir?' he said. He denies, as it were. And he said (pointing) to the fires: 'Are these fires other than fires?' The teacher said: 'What, my friend, have these fires told you?'

F. Max Müller · The Upanishads, Sacred Books of the East 1 (1879)