Derek Prince:  Fear Of Demons

If he can keep humanity unaware of his tactics-or even of his very existence-he can use the twin tools of ignorance and fear to open the way for his destructive purposes. 

Unfortunately, ignorance and fear are not confined to non-Christians. They are often at work inside the Church. All too often Christians have treated demons with superstitious dread, as if they are in the same category as ghosts or dragons.

CORRIE  TEN BOOM commented that the fear of demons is from the demons themselves.