Chapter 6 JnAna and Moksha
6-5 Katha Upanishad
6-5-9 Katha 1.2.25 The mantra reads: How can one know thus as to where It (the Self) is, for which both the Brahmin and the Kshatriya become food, and for which death takes the place of a curry? Brahma Sutra 1.2.9 clarifies who is the eater. Is it fire or the individual soul, or is it the supreme Self? The doubt is because Nachiketa has asked Yama about three entities-fire, individual soul, and the supreme Self.