Zoroastrianism is also dualist. Zoroastrians believe Ahura Mazda created two spirits: a good one (Spenta Mainyu), and a bad one (Angra Mainyu). Zoroastrians believe people are free to choose between good and bad. Choosing good will lead to happiness, and choosing bad will lead to unhappiness. So it is the best to choose good. Therefore, the motto of the religion is "Good Thoughts, Good Words, Good Deeds".