Maybe I'm off base with this interpretation, but hear me out. During this time, witches were believed to be responsible for random natural hardships. There were so-called wise women who were basically nurses/ doctors, and they would be labeled witches, tortured into confessing, and executed. There are no real witches in the common understanding of the word. With that in mind, what if some girl, growing up in that specific time period, had been accused? She maybe didn't believe in the tales, but through persecution by her own family, decided if she was going to be thought of as this hated thing, why not reap the supposed benefits of being this mythical witch. So after her family, her life falls apart, she gives up and asks pleads to Satan. She becomes an actual witch. The point is akin to "the chicken and the egg." Were it not for the rigid dogma and various multicultural superstitions of the time she would not have been driven from a suspected witch but certainly NOT a witch, to an actual witch. This seems to be allegory about how people's unfounded fears and misguided beliefs can manifest into reality. Sorry for this being long-winded. Just my take-away.