In the Kathka Upanishad, a speculative philosophical work regarded one of the later upanishads, a main character.
Nachiketas, the little kid in the narrative, is a seeker of
ultimate knowledge.
Nachiketas dutifully travels to the home of Death to offer
himself up after his father curses him to be brought to Death in a fit of rage.
He stands at Death's door for three days, but gets no
welcome since he is a brahmin visitor.
When Death reappears, he is horrified to see that his
visitor has been ignored.
To make amends, Death bestows three boons to Nachiketas.
Nachiketas' first two goals are to reunite with his father
and to comprehend the significance of a certain sacrifice ceremony.
With the last boon, he inquires as to what happens to a
person once the body dies.
Death initially attempts to avoid answering the question,
then offers Nachiketas additional gifts in exchange for his silence.
Death starts to divulge his secrets when the youngster
remains solid in his commitment.
The majority of the book is made up of this dis course.
The actuality of the Self (atman), its everlasting and
indestructible nature, and the difficulties in genuinely comprehending it are
the key themes of Death's mysteries.
The Self is depicted as the ultimate truth, and to
understand it is to understand the only thing that counts.
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