Now I know that Sielunvihollinen and Lucifer are the same thing. Better late than never!

I don't believe in these things, but there's some interesting parts in Bible - like all mythologies have their interesting parts (though Christianity is mostly boring). Lucifer represents some interesting ideas, for example free will. Sometimes Christianity adds limits and says NO to pleasure.

And no, I'm not attacking, I'm just telling about my thoughts. I'm not protesting Christians. People shall believe in whatever they want to. I'm glad that belief and religion brings happiness, answers and safety among believers.