For thirty years he (i.e., Ahriman) could not commit any sin (i.e., harm). He (Tahmurasp) killed many (devs) demons, and fairies9 and devils, and he separated the demons from all connection and company of men. 9. pairikas. -JHP
From Vivangha were born a man and woman -- were born Jama and Jamai. And Jamshed (Jama) was (possessed) of a good retinue, full of glory, of laborious habits, liberal, and successful. He took the seven countries (of the world) under his sovereignty. (He ruled) over men and demons seven hundred and seventeen years and seven months and five days.10. Clouds, wind, (and) rain were under his command. He gave the demons, the devils and the Drujs in the complete service of man (i.e., he subdued them for the good of mankind).11 The demons prepared food12 for men. Men were living in a state of easiness, fulfilling their desires. In the rulership of that Jamshed, there was neither cold nor heat, neither old age nor plague, (or untimely death), nor envy given by the demons.13 He (Jamshed) kept them away from work (i.e., counteracted their influence). He deprived of sight seven fairies, who, like a star which moves in its revolution, wandered from stars to stars. He imprisoned them and made them blind with one eye. Again he took a promise from them. He arranged cold and heat, (and) everything according to (a) measure (i.e., moderately). He made the world more prosperous. For complete 717 years and 7 months he was thankful to God. For 100 years he went away with the woman Jamai secretly to the sea in despair.14 Then, after being both grateful and well-asked for., when he became a speaker of untruth, when his splendor and glory were displeased with him, misfortune overtook him. The accursed Az-Dahak Zohak, whom they call Baevar-aspa, with the prince15 Spediver16 and with may demons caught him, slew him17, and took up one thousand rays from it (i.e., Jamshed's Glory).

(Another) Reply. The Amahraspands and other Yazads (existed for ever), because all creation and good creatures have been created by Ohrmazd. He tried. He created with purity. He saw, that it was (mixed) with light and darkness. Ahriman, like a worm, is so much associated with darkness and old age, that he (Ahriman) perishes in the end. And if Ahriman had been beaten (annihilated), then those numberless creatures and created beings would not have existed, because the world is to continue mixed for nine thousand years, because the creatures arc not of one nature, because they (partake) of light and darkness. From light (proceed) fragrance and goodness (and) every virtue and joy. From darkness (proceed) every harm because on account of the opposition of their natures, they are rivals and opponents with one another, as cold with heat, bad smell with fragrance, and darkness with light, and every other kind of evil with goodness. From all this, this must be known, that all power is not all of one nature, since all natures are opposed to their own natures, and (are) not increasers of power, because God has ordered (lit. controlled) that when water reaches water, wind reaches wind, and fire reaches fire, all their natures have boundless increase for one another. When they are of opposite natures light comes to and reaches darkness, fragrance to bad smell, heat to cold, dryness to moisture

Use DAO in which to rule and it will come back to you,
Use Light in which to rule and it will shine,
Use darkness in which to rule and you wont see,
Use folly in which to rule and it will come back and hit you.