Zoroastrianism is the religion of ancient Iran, founded by the prophet Zarathustra (Zoroaster) probably in the second millennium BCE, and still practiced today by the Parsis of India and Iran and by small communities in diaspora. It is almost certainly the earliest faith to frame the cosmos as a moral struggle between a supreme good god (Ahura Mazda) and a supreme evil antagonist (Angra Mainyu or Ahriman), and to teach that every human being's choice between good and evil contributes to the outcome of that cosmic struggle. Many of the concepts that shaped later Jewish, Christian, and Islamic eschatology — heaven and hell, the bridge of judgment, the bodily resurrection, the savior at the end of time, the final separation and renewal — appear in Zoroastrianism earlier than anywhere else.
At death, the soul (urvan) is judged individually. For three days and nights it remains near the body. On the fourth dawn it rises to the Chinvat Bridge — the Bridge of the Separator — which spans the pit of hell. As the soul approaches, it meets its own daena, the personification of the life it has lived. For the righteous, the daena appears as a beautiful maiden of fifteen, luminous and loving, who says: I am yours, and your good deeds have made me what I am. For the wicked, the daena appears as an old, withered, hideous crone, who says: I am yours, and your evil deeds have made me this. The soul then attempts to cross the bridge. For the righteous, the bridge broadens to a wide highway, and they cross into Garodemana, the House of Song, paradise. For the wicked, the bridge narrows to the edge of a razor, and they fall into hell.
Hell in Zoroastrianism — the House of the Lie — is real and painful but not eternal. At the end of time, the frashokereti (the final renovation), a savior called the Saoshyant is born of a virgin to complete Zarathustra's mission. The dead rise bodily. A great molten metal is poured over the world; to the righteous it is as warm milk, to the wicked as fire; by this they are cleansed. Even the damned are purified. At the end all souls, including Ahriman himself if he does not surrender, are destroyed or renewed, and the cosmos is restored to its original purity — the Wise Lord alone, surrounded by the now-immortal righteous, in a world without evil.
The ethical core of the tradition is captured in its three-word summary: humata, hukhta, huvarshta — good thoughts, good words, good deeds. The daena at the bridge is the accumulated balance of these three across a life. Nothing is missed; nothing is unrecorded. But the final renovation means that no soul is finally lost.
What distinguishes Zoroastrianism is the combination of strict dualism in this life and eventual monistic restoration at the end. The struggle is real. The good must fight the evil. But good wins. The cosmos was made pure and will be pure again, and every act of truth speeds that restoration. A Zoroastrian is told: you are on the side of Ahura Mazda, and your good deeds are how the battle is fought.
