" He shrugged. - They're just people - he said. - They're just doing what people do. Sir.
Lord Vetinari gave him a friendly smile.
- Of course, of course - he said. - You have to believe that, I appreciate. Otherwise you'd go quite mad. Otherwise you'd think you're standing on a feather-thin bridge over the vaults of Hell. Otherwise existence would be a dark agony and the only hope would be that there is no life after death. I quite understand. "

― Terry Pratchett , Guards! Guards! (Discworld, #8; City Watch #1)