Ask The Rabbi!!

Rabbi,

Perhaps you can enlighten me on a religious point. I have studied as much as I can find at the used book store and the library which isn't nearly as much as I wish. My background is Christian, Baha'i, and now a cynical agnostic. My question is about the nature of Satan. From what I've read, the duality of good and evil was greatly changed once the Jewish nation came in contact with Zoroastrians in their exile in Babylon. From what little I have read, Satan was Ha-Satan or the greatest servant of G-d and tested the servants of G-d. He was not a diametrically opposed being of once angelic origins. The story of Job makes a lot more sense to me when I heard about this context. For some reason there is a... misconception or evolution of the character of Satan from greatest servant to diametrically opposed evil incarnate a la Zoroastrian Angra Mainyu at least in the modern Christian view of Satan. Is there a fall of Satan in pre-Babylon writings?