Zoroastrism is a monotheist religion, possibly the oldest in the world. Ahura Mazda, the "Lord of Wisdom", is the creator of the world. He brings a holy spirit, carrier of truth and knowledge, "Spenta Mainyu". Opposing this holy spirit is "Angra Mainyu", the evil spirit of darkness. Zoroastrism heralds the final victory of Ahura Mazda and of the forces of light and goodness.