Religion & the Lie: the Achaemenid religious world

The problem of the evidence

No Achaemenid ever wrote a treatise on his religion, and the sources that survive pull in different directions. The kings' own inscriptions are theology in the service of power: they name Ahura Mazdā as the giver of kingship and the enemy of the Lie, but they are propaganda, and they are silent on much that we would most like to know. The Greek writers — Herodotus above all, then Xenophon, Strabo, and Plutarch — are curious and often well-informed, but they are outsiders describing rites they did not share and interpreting Persian gods through Greek names. The Avesta, the scripture of later Zoroastrianism, preserves genuinely ancient Iranian material but was written down centuries after the Achaemenids fell, and cannot simply be read back onto them. The administrative tablets from Persepolis add a precious third kind of evidence — records of rations issued for the worship of Ahura Mazdā and of Elamite and other gods side by side — but they are ledgers, not creeds. Any account of Achaemenid religion is therefore a reconstruction, and the honest ones say so.

The Wise Lord and the order of the world

At the centre stands Ahura Mazdā, the Wise Lord, whom the royal inscriptions invoke as creator of earth, sky, and man, and as the god who made Darius king. His creation is ordered by arta (Avestan aša), the truth or right arrangement of all things, and it is threatened by the drauga, the Lie — falsehood, chaos, disloyalty. This dualism of Truth and Lie is the moral and political axis of the whole system. Darius's monument at Behistun casts his contested accession as a war of the Truth: his rivals 'lied', the provinces 'became faithless', and Ahuramazda gave victory to the king who was no lie-follower. On his tomb he makes it an ethic — friend to the right, no friend to the wrong, protector of the weak against the strong — and Herodotus independently reports that the Persians thought lying the most shameful thing a man could do. Whether this is 'Zoroastrianism' is the field's oldest question (below); that it is a coherent and deeply Iranian religious vision of the king as the agent of cosmic order is not in doubt.

The Magi and the rites

Worship was mediated by the Magi, the hereditary priestly class. A Persian, Herodotus says, does not raise an altar or kindle a fire to sacrifice, but leads the victim to a clean high place and calls on the god, and no offering may be made without a magus chanting over it. The Magi tended the sacred fire, the purest of the creations and the visible focus of worship, guarding it from the pollution of breath with a cloth over the mouth and handling the barsom, the sacred bundle of twigs. They read dreams and omens for the king, presided over the oath sworn under the eye of Mithra the covenant-keeper, and conducted the distinctive Iranian treatment of the dead — exposure of the corpse so that it should not defile earth or fire, the dry bones afterwards gathered away. Fire was worshipped in the open air; the enclosed fire-temple is a later, Sasanian development, and to read it back into the Achaemenid period is an anachronism.

Tolerance and its limits

The Achaemenid state did not impose the worship of Ahura Mazdā on its subjects. Cyrus restored the temples and gods of Babylon and returned the exiled peoples, and had himself portrayed as the chosen of Marduk and, in the Hebrew Bible, as the anointed of Yahweh; Darius funded the rebuilding of the temple at Jerusalem and honoured the gods of Egypt; the Persepolis tablets record rations for many gods at once. This pragmatic pluralism was a instrument of rule as much as a principle, and it had hard limits — Babylon's rebels were impaled, and the so-called daiva inscription of Xerxes boasts of destroying the sanctuary of the daivas, the 'false gods', somewhere in the empire, and establishing the worship of Ahura Mazdā in its place. Whether that was a real religious persecution or a formulaic claim against a rebel cult is debated; either way, toleration was policy, not indifference.

The Zoroastrian question

Were the Achaemenid kings Zoroastrians? They worship the Wise Lord of Zarathustra's hymns; they make Truth-against-the-Lie the heart of their ideology; their priests are the Magi who would later carry the Zoroastrian tradition. Yet no king ever names the prophet; the state cult tolerates and funds other gods; and Ahura Mazdā is sometimes invoked 'with the other gods'. The prudent modern consensus calls the Achaemenid state cult Mazdaean — devoted to Ahura Mazdā, drawing on the same old Iranian religious world from which Zoroastrianism grew — while leaving open exactly how, and how early, the reform of Zarathustra fed into it. It is a case where the honest answer is a well-defined uncertainty, and this compendium keeps it so.