hitchhikers guide - Why does everyone in the universe have a feeling that something's going on that nobody would tell them what it is?

"You know," said Arthur thoughtfully, "all this explains a lot of things. All through my life I've had this strange unaccountable feeling that something was going on in the world, something big, even sinister, and no one would tell me what it was."
"No," said the old man, "that's just perfectly normal paranoia. Everyone in the Universe has that."
_-THGTTU