Abstract
In some verses from the Manichaean Middle Persian hymn-cycle, the Gōwišn īg grīw zīndag, the Light Self, or sum of the light elements in the world, speaks in the character both of the sacred fire of the Zoroastrians, and of the pure water reverenced by them. The editors of these verses pointed out that the use of certain technical terms shows that the Manichaean author had an intimate knowledge of Zoroastrian ritual. The publication since then of further Zoroastrian works has established this fact even more plainly; for it is now apparent that the term zōhr, which occurs twice in the text, is used in fact for two separate Zoroastrian offerings, the offering to fire, the ātaš-zōhr, as well as that to water, the āb-zōhr.

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