KAṬHA UPANISHAD · 1.2.4

दूरमेते विपरीते विषूची
अविद्या या च विद्येति ज्ञाता ।
विद्याभीप्सिनं नचिकेतसं मन्ये
न त्वा कामा बहवोऽलोलुपन्त ॥ ४॥

dūramete viparīte viṣūcī
avidyā yā ca vidyeti jñātā ।
vidyābhīpsinaṃ naciketasaṃ manye
na tvā kāmā bahavo’lolupanta ॥ 4॥

For far apart are these, opposite, divergent, the one that is known as the Ignorance and the other the Knowledge. But Nachiketas I deem truly desirous of the knowledge whom so many desirable things could not make to lust after them.