Mantra 4

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

In plain words

These two — the ignorance one knows as avidyā, and the knowledge one knows as vidyā — lie far apart, opposed to one another. I judge Naciketas to be one who desires knowledge: the many desires did not tempt you away.