On Advaita Vedanta: The real glory of Nachiketa

The following excerpt is from a samvaad (dialogue) session with Acharya Prashant.

Questioner (Q): In Katha Upanishad, the young boy Nachiketa attained the highest wisdom and immortality by the virtue of dispassion and the firm resolve to know the Truth. Kindly speak on the virtues of determination and dispassion that Nachiketa had.