I think I slightly dis-agree with what you're saying. I suppose I got out of your comment evil only comes when you're being unrighteous. I think we need to remember the more spiritual you are, the harder Satan will work on you. I do agree, however, that we do often have the power to cast out Satan. We know from the scriptures, God will never allow more to happen to us than we can bear. I think that includes He will always provide a way for us to get rid of an evil spirit, whether it's getting rid of it ourselves, the ability to call someone with greater authority, etc. And absolutely, I agree we should live as righteously as possible! But that one's a given. It can mean successfully helping others when they are past helping themselves, when influenced by an evil spirit.