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7.2 Zoroastrianism: History and Core Beliefs

7.2 Zoroastrianism: History and Core Beliefs

Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025
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Zoroastrianism, founded by the prophet Zarathustra in ancient Iran, centers on the worship of Ahura Mazda, the supreme god of wisdom and goodness. This faith emphasizes the cosmic struggle between good and evil, with humans playing a crucial role through their choices. Its core ideas about judgment, heaven and hell, and the eventual triumph of good influenced Judaism, Christianity, and Islam, making it one of the most historically significant religions in the world.

Origins and Key Figures

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Zarathustra and the Founding of Zoroastrianism

Zarathustra (also called Zoroaster by the Greeks) was an ancient Iranian prophet who founded Zoroastrianism. Scholars debate his exact dates, with estimates ranging from around 1500 BCE to 600 BCE, though many place him somewhere in that broad window. What's agreed upon is that he lived in the eastern Iranian cultural world and broke sharply from the older polytheistic religion of his time.

  • Zarathustra claimed to have received divine revelations directly from Ahura Mazda
  • He rejected the worship of the daevas, the old Iranian gods, calling them false and harmful
  • His central ethical teaching is the triad of good thoughts, good words, and good deeds (Humata, Hukhta, Huvarshta), which remains the moral foundation of the religion

Ahura Mazda and Angra Mainyu

Ahura Mazda ("Wise Lord") is the supreme deity in Zoroastrianism. He represents wisdom, light, and goodness, and is credited with creating the universe and everything good in it, including humans, animals, and the natural world.

Angra Mainyu (also called Ahriman) is the destructive spirit who opposes Ahura Mazda. He represents darkness, chaos, and evil. Unlike Ahura Mazda, Angra Mainyu does not create; he corrupts and destroys what already exists.

The relationship between these two figures is central to the religion. Humans possess free will and must choose between following Ahura Mazda or falling under the influence of Angra Mainyu. Those choices shape both the world around them and their fate after death.

Core Beliefs

Zarathustra and the Founding of Zoroastrianism, Ahura Mazda | A depiction of the Zoroastrian god Ahura Mazda… | Flickr

Dualism and the Cosmic Struggle

Zoroastrianism rests on a dualistic worldview: the universe is a battleground between the forces of good (led by Ahura Mazda) and the forces of evil (led by Angra Mainyu). This isn't a struggle between two equal gods, though. Ahura Mazda is ultimately supreme, and Zoroastrian teaching holds that good will triumph in the end.

  • Humans are active participants in this struggle, not passive bystanders
  • Every moral choice you make either strengthens the side of good or feeds the side of evil
  • The ultimate goal is Frashokereti, the final renovation of the world, when evil is destroyed and a perfect existence is established

Asha and the Importance of Truth

Asha is one of the most important concepts in Zoroastrianism. It's often translated as "truth," but it means something broader: cosmic order, righteousness, and the way things ought to be. Think of it as the underlying principle that holds the universe together on the side of good.

  • Living in accordance with Asha means being honest, just, and compassionate in daily life
  • Lying and deception are considered grave sins because they align a person with Angra Mainyu and the forces of disorder
  • Upholding Asha isn't just a personal virtue; it's seen as directly supporting Ahura Mazda in the cosmic struggle

Fravarti and the Afterlife

Fravarti (also spelled Fravashi) refers to the immortal soul or guardian spirit of each individual. Zoroastrianism teaches that every person has one, and it exists before birth and survives after death.

After death, the soul faces judgment based on the sum of the person's thoughts, words, and deeds:

  1. The soul approaches the Chinvat Bridge (the "Bridge of the Separator")
  2. If the person's good deeds outweigh their evil, the bridge is wide and easy to cross, leading to the House of Song (paradise)
  3. If evil deeds outweigh good, the bridge narrows to a razor's edge, and the soul falls into the House of Lies (hell)

This emphasis on individual moral responsibility and a post-death judgment was a groundbreaking idea in the ancient world and likely influenced later Abrahamic concepts of heaven and hell.

Zarathustra and the Founding of Zoroastrianism, Zarathustra زرادشت Zerdeşt -زرتشت-Zoroastre Avesta (pirtûk… | Flickr

Sacred Texts and Rituals

The Avesta and Yasna

The Avesta is the primary collection of Zoroastrian sacred texts. Its most important section is the Gathas, a set of 17 hymns attributed directly to Zarathustra himself. The Gathas are written in an ancient Iranian language closely related to Vedic Sanskrit, and they contain Zarathustra's core theological and ethical teachings.

The Yasna is the central liturgical ritual of Zoroastrianism. During the Yasna:

  • Priests recite prayers and passages from the Avesta
  • Sacred offerings are made, including haoma (a ritually prepared plant-based drink) and bread
  • The ceremony takes place in a fire temple and is meant to strengthen the bond between worshippers and Ahura Mazda

Fire Temples and Sacred Fires

Fire holds a central place in Zoroastrian worship, not as an object of worship itself, but as a symbol of purity, light, and the presence of Ahura Mazda. Zoroastrians pray in the direction of fire or light as a way of orienting themselves toward truth.

Fire temples (called Agiaries or Dar-e Mehrs) house sacred fires that are kept burning continuously. There are three grades of sacred fire, ranked by their ritual significance:

  • Atash Behram (Fire of Victory): the highest grade, requiring the most elaborate consecration process
  • Atash Adaran (Fire of Fires): a mid-level fire, typically found in community temples
  • Atash Dadgah (Fire of the Hearth): the simplest grade, which can be maintained in a home

Priests tend these fires carefully, and they are never allowed to go out.

The Zoroastrian Calendar and Festivals

The traditional Zoroastrian calendar is solar, consisting of 12 months of 30 days each, plus five extra days called Gatha days added at the end of the year (totaling 365 days).

Several festivals mark the calendar:

  • Nowruz (the Persian New Year) is the most widely celebrated, falling on the spring equinox. It predates Islam in Iran and is still observed by millions of people across the region today.
  • The Gahambars are six seasonal festivals spread throughout the year, each lasting five days. They celebrate Ahura Mazda's creation of the sky, water, earth, plants, animals, and humans.

During these festivals, worshippers gather in fire temples and homes to pray, share communal meals, and celebrate. The festivals reinforce both the community's connection to Ahura Mazda and the Zoroastrian emphasis on the goodness of the natural world.