Zoroastrian Religion and Tradition
The 17 hymns in the Gathas are the only part of the Avesta (the primary collection of religious texts of Zoroastrianism) composed by Zarathustra Spitama, the prophet of the Zoroastrian religion.
The Gathas, also known as Zarathustra’s Manthras (instrument of thought, a thought provoker) are his teachings and are referred to as the core of the Zoroastrian religion.