Zurvanism isn’t even truly dualistic, because the single deity Zurvan engendered both Ahura Mazda and Ahriman. You might say it’s monistic.
That’s the
modern Zoroastrian explanation I was talking about.
The thing about the Spenta Mainyu is that while you do have a few references in
the Gathas which seem to speak of it as being independent of Ahura Mazda (Yasht 13.12-13, 15.2-3), very often it’s more ambiguous: you could read the Spenta Mainyu as being simply an attribute of Ahura Mazda or an epithet of his / stand-in for him. (To Spenta Mainyu belongs the “good creation” (
Yasna 57.17;
Yasht 11.12; 13.76; 15.3, 43-44;
Vendidad 3.20; 13.1-2, 5-6, 16); the stars are creatures of his (
Yasna 1.11; 12.32).) It is only in the later texts like the
Denkard (8th-10th century AD) that the Spenta Mainyu is explicitly distinguished from Ahura Mazda and presented as a creature of his.
You might say that the ambiguity about whether Zoroaster or the early ‘Zoroastrians’/Mazdaists believed in a form of monotheism or a sort of dualism might have already existed earlier (some scholars even say that
both ideas are paradoxically found - yet not fully-developed - in the earlier texts like the
Gathas), which is why Zurvanism came to exist in the first place.
- Yes, there are two fundamental spirits, twins yə̄mā] which are renowned to be in conflict. In thought and in word, in action, they are two: the good and the bad. And between these, the beneficent have correctly chosen, and not the maleficent.
- Furthermore, when these two spirits first came together, they created life and death, and how, at the end, the worst existence shall be for the deceitful but the best thinking for the truthful person.
- Of these two Spirits, the deceitful chose to bring in realization of the worst things. (But) the very virtuous spirit mainyuš spə̄ništō = Spenta Mainyu], who is clothed in the hardest stones, chose the truth, and (so shall those) who shall satisfy the Wise Lord Ahura Mazda] continuously by truthful actions.
- The gods daēvā] did not at all choose correctly between these two, since the deceptive one approached them as they were deliberating. Since they chose the worst thought, they then rushed into fury, with which they have afflicted the world and mankind.
(Yasna 30.3-6)