Zoroaster Moses, Jesus and Muhammad had all brought them, so why did you not believe in any of these prophets, having believed in Zoroaster, through the tales that came to you about him, informing that he brought forth what others did not?” Ahmadi Muslims view Zoroaster as a Prophet of God and describe the expressions of Ahura Mazda, the god of goodness, and Ahraman, the god of evil, as merely referring to the coexistence of forces of good and evil enabling humans to exercise free will. Mirza Tahir Ahmad, the fourth Caliph of the Ahmadiyya Muslim Community, in his book "Revelation,
Thus Spoke Zarathustra and time", as evidence of this. More specifically, this note related to the concept of the eternal recurrence, which is, by Nietzsche's admission, the central idea of "Zarathustra"; this idea occurred to him by a "pyramidal block of stone" on the shores of Lake Silvaplana in the Upper Engadine, a high alpine region whose valley floor is at . Nietzsche planned to write the book in three parts over several years. He wrote that the ideas for "Zarathustra" first came to him while walking on two roads surrounding Rapallo, according to Elisabeth Förster-Nietzsche in the introduction of Thomas Common's early