I believe this thing with demons has different forms. There is the 'doctrine of demons,' which is the false doctrines that is blasphemous to God. Here is a quote from Ray's in his letter to John Hagee, "
People will finally see this evil teaching for what it is: an anti-Scriptural, anti-God, doctrine of demons, and Satan's greatest effort to blaspheme the very name of God among the nations."
Then there is 'sleep paralysis' that Craig mentioned.
But there are spirit beings known as demons that are very real and can bring about real (not imagined) terror and fearful unexplained phenomena (unexplainable physically anyway). I think it may have been Paul's thorn in the flesh. Jesus cast out and even spoke to these 'demons,' as did the Apostles Here is where Ray spoke about this at a conference.
http://forums.bible-truths.com/index.php/topic,4472.0.html ----
One of the ministers came up to Eliot and me and ask us to come to a side room, ‘We have a little problem.’ We said okay, we’ll help and went with him. So in the room there was about 5 of us and there was this women. She was about 75 years old, with gray hair, a little on the hefty side. She was acting strange. So we ask what was going on, and he said, ‘well we think Anne is having a problem.’ So we were gathered around and Anne was looking a little strange, she would snarl her face up and say, ‘I know who you are.’ This was a 75 year old woman, with gray hair and she is talking like a monster, you know. We said, okay we know what we got here. These things would take her over and she would get violent and wanted to attack us. There were five strong men, in our 30’s trying to hold her down.
This was a 75 year old lady, each of us had one arm one leg, she was just violent. We would ask, ‘who are you?’ She would just snarl and then she would give us a name. We didn’t know, so we would just command these things to come out, in the name of Jesus Christ. Then she would settle down and be like, ‘what are you all doing?’ We’d say, well you’re not feeling to good Anne, ‘well, what’s wrong?’ You are just not feeling good right now. Then her face would snarl up and she would start yelling at us. We would say, who are you? It’s kind of comical now, I don’t think that demons are smart. I remember that at one point there was one, I did know them all, but I started to forget them. But this one was named Bok, and we cast out Bok. Then we cast out a bunch of others. So one after the other, they would just take her and we’d cast them out, then she would just settle down and be fine. She would say, ‘what’s wrong, why am I on the floor?’ She didn’t know what was happening. We would ask each one’s name and it was a different demon. One time I ask who are you, and it said ‘Bouk,’ we said wait a minute we just cast you out, it said, ‘no, that was Bok, I’m Bouk.’ I’m serious.
We were there for an hour or two, casting out demons. Some of them just would not come out, it said, ‘the master would be very angry.’ We ask who is the master, it said, ‘ Beelzebub is the master.’ They didn’t want to come out. Then she would settle down for a while. Then this one, we said who are you, it said ‘no’ we said we command you in the name of Jesus Christ what is your name, ‘no’ we said we command you, you have to tell us, ‘my name is no.’ She would settle down and then another would take her over and she would want to attack us and kill us. I tell you by the time we were done, it was enervating. We knew we were in a different realm. We ask them questions and we ask them about stuff, we knew about to see if they knew about it. So this stuff is real. This is not fairy land or the wizard of Oz, this stuff really does exist. They're spirits in the air.
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mercy, peace and love
Kat