The Secret of the Katha Upanishad : 3.2. Swami Krishnananda.
======================================================================== ========================================================================= Sunday, August 14, 2022. 06:00. Discourse -3. Post -13. ======================================================================== Now, Yama comes to the main argument of the whole Upanishad, and the heart and soul of the aspiration of Nachiketas. How can one know it? There must be something extremely difficult about it; else, Yama would not have been so reluctant to speak of it. However much you may scratch your head, rack your brain or think about it, or argue, or read, or speak, you cannot understand it. nāyam ātmā pravacanena labhyo na medhayā, na bahunā śrutena. Even if you ponder over it in all possible ways, you will not gain an access into this knowledge. So difficult is its deep significance to grasp. That is why Yama thought it better if he kept quiet about it. But Nachiketas would not leave him. na nareṇāvareṇa proktā eṣa suvijñey