Ethical dualism or, as theorized by Descartes, between thought and extension. Ethical dualism on the other hand highlights the moral dimension instead or in addition to the metaphysical one, and envisions an inherent situation of conflict between two antagonistic forces, like light and darkness, Good and Evil. One of the most known and clear-cut interpretations of ethical dualism is the one conceptualized by Zoroastrianism, the ancient Persian religion, which bases its thought on the figure of the prophet Zoroaster (or Zarathustra), who claimed the existence of two original and contrasting principles, Ahura Mazda and Ahriman, respectively representing the forces of Good and
Thus Spoke Zarathustra Zarathustra recognizing that his legacy is beginning to perpetuate, and consequently choosing to leave the higher men to their own devices in carrying his legacy forth. "Zarathustra" also contains the famous dictum "God is dead", which had appeared earlier in "The Gay Science". In his autobiographical work "Ecce Homo", Nietzsche states that the book's underlying concept is discussed within "the penultimate section of the fourth book" of 'The Gay Science' ("Ecce Homo", Kaufmann). It is the eternal recurrence of the same events. This concept first occurred to Nietzsche while he was walking in Switzerland through the woods along the lake