One of my church members has asked me the following question by email:
My husband asked me why God created Satan as it seems a 'vindictive' thing to do. I did not have a satisfactory answer. Have found various theories on websites. I would be interested to know what you think. Please, when you have a moment, could you let me know.
I've responded with my initial thoughts, but I'd be interested to hear of any resources you might point me to or any thoughts on how you'd reply.