The Ancients

Zoroastrianism

November 20, 2025

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  • Zoroastrianism is one of the world's oldest living religions, with its oldest texts, the Gathas, dating linguistically to the middle of the second millennium BCE, preserved in the archaic language Avestan. 
  • The core of early Zoroastrianism, as revealed in the Gathas, involves the prophet Zarathustra proclaiming the worship of the sole good creator, Ahura Mazda, and the vehement rejection of the old gods, referred to as the Daivas. 
  • Zoroastrian cosmology is fundamentally dualistic, pitting the life-bearing, creative force (Spenta Mainyu) of Ahura Mazda against the destructive, hostile force (Angra Mainyu), and this framework dictates beliefs in individual judgment after death and a final resurrection and perfection of the world. 

Segments

Linguistic Dating of Gathas
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(00:07:31)
  • Key Takeaway: The dating of the Gathas to the mid-second millennium BCE is based on the presence of prehistoric laryngeal consonants in Avestan, which later disappeared in most Indo-European languages.
  • Summary: Linguists date the Gathas based on the presence of laryngeals, consonants pronounced in the back of the throat, which must have still existed when the texts were composed. The meter of the Gathas indicates that two vowels coalesced into one long vowel where a laryngeal previously separated them. This linguistic evidence strongly suggests composition no later than the middle of the second millennium BCE.
Indo-Iranian Linguistic Ancestry
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(00:09:31)
  • Key Takeaway: Iranian languages, including Avestan, are sister languages to the Indo-Aryan languages (like Vedic Sanskrit), both deriving from a common, unattested Indo-Iranian ancestor.
  • Summary: Comparative philology shows Iranian and Indo-Aryan languages share a common prehistoric ancestor, Indo-Iranian. The oldest surviving documents are the Avesta (Gathas) and the Vedic hymns (Rig Veda). Linguistic similarities are so strong that expressions in Avestan can be transposed into Sanskrit, suggesting mutual intelligibility between early speakers.
Origins: Rejection of Old Gods
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(00:14:33)
  • Key Takeaway: A key innovation marking the start of Zoroastrianism after the Indo-Iranian split was the demonization of the old gods, called ‘Daivas,’ which were worshipped by the Indo-Aryans as ‘Devas.’
  • Summary: Zoroastrianism developed after the split between Iranians and Indo-Aryans, evidenced by the Iranian rejection of the old gods (Daivas). In Sanskrit, the cognate word ‘Deva’ means God, but in the Avestan Gathas, Daivas are vehemently rejected as false gods. This rejection of established cults and priesthoods signals a major cultural and religious change.
Zarathustra and Ahura Mazda
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(00:19:07)
  • Key Takeaway: The Gathas detail dialogues between the prophet Zarathustra and Ahura Mazda, who is presented as the creator of the cosmos and the source of moral guidance, contrasting sharply with the rejected Daivas.
  • Summary: Zarathustra’s name appears 16 times in the 17 hymns of the Gathas, where he questions Ahura Mazda about creation and moral order. Ahura Mazda is portrayed as the creator of the cosmos, responsible for natural order, and the one who dictates that followers must pursue truth (Asher) and reject the Daivas.
Dualism: Spenta Mainyu vs. Angra Mainyu
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(00:22:38)
  • Key Takeaway: Zoroastrianism features a dualistic structure where the wholly good creator, Ahura Mazda, is opposed by the primordial, eternal, destructive spiritual force known as Angra Mainyu.
  • Summary: Ahura Mazda is the wholly good creator, whose creative, life-bearing spiritual force is called Spenta Mainyu (life-bearing force). This force is diametrically opposed by Angra Mainyu (destructive force), which seeks to destroy all creation but is incapable of creating matter. Humans must choose to align themselves with Ahura Mazda’s creative force against the destructive one.
Cosmology and Eschatology
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(00:35:06)
  • Key Takeaway: Zoroastrian cosmology encompasses a plan by Ahura Mazda to incapacitate evil through the creation of the spiritual and material worlds, culminating in the final defeat of Angra Mainyu and the resurrection of the dead.
  • Summary: Ahura Mazda’s creation plan aims to incapacitate, not destroy, the eternal evil force, Angra Mainyu, which intrudes upon the material world. The fight against evil is the purpose of this world, leading to a final defeat of evil, the resurrection of the body (as death is seen as evil’s victory), and the eternal continuation of Ahura Mazda’s creation.
Individual and Universal Judgment
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(00:47:04)
  • Key Takeaway: Zoroastrian eschatology involves two judgments: an individual judgment for the immortal soul (Urvan) immediately after death, and a universal judgment at the end of time following bodily resurrection.
  • Summary: Upon death, the soul (Urvan) faces individual judgment based on accumulated good thoughts, words, and deeds, determining passage over the Chinvat Bridge to paradise or a place of suffering until the end of time. At the end of time, a universal judgment occurs where resurrected bodies pass through molten metal, uniting with their souls to exist perpetually with Ahura Mazda.
Ritual Disposal of the Dead
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(00:53:23)
  • Key Takeaway: Due to the belief that death is an evil victory, Zoroastrians practice excarnation, exposing the dead body to vultures to prevent polluting the pure elements of earth, water, or fire.
  • Summary: Dead bodies are considered extremely polluting because they are products of Angra Mainyu’s victory (death) and must be removed quickly from the living world. Burial pollutes the earth, water pollution is forbidden, and cremation is out of the question because fire is sacred to Ahura Mazda. Exposure to vultures (excarnation) is the preferred method, followed by secondary burial of the clean bones.
Zoroastrian Influence and Legacy
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(01:00:09)
  • Key Takeaway: Zoroastrian concepts, particularly the dualistic struggle against death and the development of eschatology, likely influenced contemporary religions like Judaism during the Achaemenid period, as suggested by the Magi in the Nativity story.
  • Summary: Intellectual and religious exchanges occurred between Zoroastrians and Jews in Mesopotamia under Achaemenid rule, potentially leading to the development of eschatological ideas in the Hebrew Bible, such as the ultimate defeat of death. The wise men (Magoi) visiting the infant Jesus were likely Zoroastrian priests, as ‘Magush’ is the term for a Zoroastrian priest, and the term ‘Maga’ relates to the ritual gift exchange.