From the Wikipedia entry on Zoroastrianism, 20/11/2015:
In Zoroastrianism, the purpose in life is to “be among those who renew the world…to make the world progress towards perfection”. Its basic maxims include:
- Humata, Hukhta, Huvarshta, which mean: Good Thoughts, Good Words, Good Deeds.
- There is only one path and that is the path of Truth.
- Do the right thing because it is the right thing to do, and then all beneficial rewards will come to you also.
The most important texts of the religion are those of the Avesta, which includes the writings of Zoroaster known as the Gathas, enigmatic poems that define the religion’s precepts, and the Yasna, the scripture. The full name by which Zoroaster addressed the deity is: Ahura, The Lord Creator, and Mazda, Supremely Wise. He proclaimed that there is only one God, the singularly creative and sustaining force of the Universe. He also stated that human beings are given a right of choice, and because of cause and effect are also responsible for the consequences of their choices. Zoroaster’s teachings focused on responsibility, and did not introduce a devil, per se. The contesting force to Ahura Mazda was called Angra Mainyu, or angry spirit. Post-Zoroastrian scripture introduced the concept of Ahriman, the Devil, which was effectively a personification of Angra Mainyu.