I read today was this quote from Terry Pratchett from The Truth: a Novel of Discworld:

"Be careful. People like to be told what they already know.  Remember that.  They get uncomfortable when you tell them new things.  New things ... well, new things aren't what they expect. They like to know that, say, a dog will bite a man. That is what dogs do.  They don't want to know that man bites dog, because the world is not supposed to happen like that. In short, what people think they want is news, but what they really crave is olds ... Not news but olds, telling people that what they think they already know is true."

I found the quote in David McRaney's book Your Are Not So Smart.  It is an awesome read if you're looking to learn something new about yourself - news as opposed to olds.