Rabelais toys with this idea. In some sense it is necessary theologically that Satan (and his followers) exist if a dialectical approach is taken. That view g

Rabelais toys with this idea. In some sense it is necessary theologically that Satan (and his followers) exist if a dialectical approach is taken. That view goes back thousands of years, to before Christianity, with the eternal struggle of Ahura Mazda and Angra Mainyu.