Dialogue between Yama and Nachiketas

   Nonviolence is all the offerings. Renunciation is the priestly honorarium. The final purification is death. Thus all the Divinities are established in this body. [Krishna Yajur Veda, Pranagnihotra Upanishad 46-8. ve, 413-14]
Nachiketa said: O Death, may Gautama, my father, be calm, cheerful and free from anger toward me! May he recognise me and greet me when I shall have been sent home by you! This I choose as the first of the three boons.
Yama said: Through my favour, your father, Auddilaki Aruni, will recognise you and be again toward you as he was before. After having seen you freed from the jaws of death, he will sleep peacefully at night and bear no anger against you. [Yajur Veda, Katha Upanishad, Part One, Chapter I, 10 -11]
   Nachiketa said: In the Heavenly World there is no fear whatsoever. You, O Death, are not there and no one is afraid of old age. Leaving behind both hunger and thirst and out of the reach of sorrow, all rejoice in Heaven. You know, O Death, the Fire-sacrifice, which leads to Heaven. Explain it to me, for I am full of faith. The inhabitants of Heaven attain immortality. This I ask as my second boon.
   Yama said: I know well the Fire-sacrifice, which leads to Heaven and I will explain it to you. Listen to me. Know this Fire to be the means of attaining Heaven. It is the support of the universe; it is hidden in the hearts of the wise. Yama then told him about the Fire, which is the source of the worlds and what bricks were to be gathered for the altar and how many and how the sacrificial fire was to be lighted. Nachiketa, too, repeated all this as it had been told him. Then Yama, being pleased with him, spoke again. [Yajur Veda, Katha Upanishad, Part One, Chapter I, 13 – 15]
 Nachiketa said: But, O Death, these endure only till tomorrow. Furthermore, they exhaust the vigour of all the sense organs. Even the longest life is short indeed. Keep your horses, dances and songs for yourself. Wealth can never make a man happy. Moreover, since I have beheld you, I shall certainly obtain wealth; I shall also live as long as you rule. Therefore no boon will be accepted by me but the one that I have asked.
     Who among decaying mortals here below, having approached the undecaying immortals and coming to know that his higher needs may be fulfilled by them, would exult in a life over long, after he had pondered on the pleasures arising from beauty and song?
   Tell me, O Death, of that Great Hereafter about which a man has his doubts. [Yajur Veda, Katha Upanishad, Part One, Chapter I, 26 - 29]
   Yama said: The good is one thing; the pleasant, another. Both of these, serving different needs, bind a man. It goes well with him who, of the two, takes the good; but he who chooses the pleasant misses the end. [Yajur Veda, Katha Upa. Part One, Chapter II, 1]