Originally posted by M
If you're talking about someone and just at that point they walk in you say, ' speak(ing) of the devil'
Now what's that all about?

I don't know the origin of the phrase, but from what I've heard, its a lot like those old 'Candyman' movies, and the 'Beetlegeuse' premise.
Summoning evil spirits and the like.
The common denominator in all those beliefs, and the other, more obscure ones I've heard of (people summoning demons, and perhaps even the devil by
chanting words and using mirrors, ouija's, etc.), is that if you BELIEVE something enough, to the point of
KNOWING its true, or possible, or
do-able, it becomes reality. This is also, I've found, the common premise of such things as telepathy, telekinesis and the like.