How, he wondered forlornly, and when, did I become indistinguishable from the bad guys? - Tim Powers

Which perspective is true? he thought. Which do I want to be true?

“Under what circumstances do you think you might want to…return to the real world?”
The real world and I never did get along, she thought.
“I can’t imagine,” she said.

People in 1900 didn’t think that radium could hurt you, just carrying a chip of it in your pocket like a lucky rock, and then one day their legs fell off and they died of cancer. Not believing something is no help if you turn out to be wrong.