If it bore witness to the reverence for Arta found among all the Aryans,then it drew as well on the teachings of a far more rigorous dualism. ‘The twin destinies of the Liar and of the Righteous Man’: not Darius’ words but those of that most fabled of visionaries, Zoroaster, the prophet of the Aryans, the man who had first revealed to a startled world that it was the battleground in a relentless war between good and evil.