Marvin was humming ironically because he hated humans so much. - Douglas Adams

"On the wall was a Duran Duran poster on which someone had scrawled in fat red felt tip, "Take this down please."
Beneath that another hand had scrawled, "No."
Beneath that again the first hand had written, ""I insist that you take it down."
Beneath that the second hand had written, "Won't!"
Beneath that - "You're fired."
Beneath that - "Good!"
And there the matter appeared to have rested.

She thought that trying to live life according to any plan you actually work out is like trying to buy ingredients for a recipe from the supermarket. You get one of those trolleys which simply will not go in the direction you push it and end up just having to buy completely different stuff. What do you do with it? What do you do with the recipe? She didn't know.

"The Hitchhiker's Guide to the Galaxy is an indispensable companion to all those who are keen to make sense of life in an infinitely complex and confusing Universe, for though it cannot hope to be useful or informative on all matters, it does at least make the reassuring claim, that where it is inaccurate it is at least definitively inaccurate. In cases of major discrepancy it's always reality that's got it wrong.

This was the gist of the notice. It said "The Guide is definitive. Reality is frequently inaccurate."

This has led to some interesting consequences. For instance, when the Editors of the Guide were sued by the families of those who had died as a result of taking the entry on the planet Tralal literally (it said "Ravenous Bugblatter Beasts often make a very good meal for visiting tourists: instead of "Ravenous Bugblatter Beasts often make a very good meal of visiting tourists"), they claimed that the first version of the sentence was the more aesthetically pleasing, summoned a qualified poet to testify under oath that beauty was truth, truth beauty and hoped thereby to prove that the guilty party in this case was Life itself for failing to be either beautiful or true. The judges concurred, and in a moving speech held that Life itself was in contempt of court, and duly confiscated it from all those there present before going off to enjoy a pleasant evening's ultragolf.