“My favourite piece of information is that Branwell Brontë, brother of Emily and Charlotte, died standing up leaning against a mantle piece, in order to prove it could be done.This is not quite true, in fact. My absolute favourite piece of information is the fact that young sloths are so inept that they frequently grab their own arms and legs instead of tree limbs, and fall out of trees. However, this is not relevant to what is currently on my mind because it concerns sloths, whereas the Branwell Brontë piece of information concerns writers and feeling like death and doing things to prove they can be done, all of which are pertinent to my current situation to a degree that is, frankly, spooky.”

“My absolute favourite piece of information is the fact that young sloths are so inept that they frequently grab their own arms and legs instead of tree limbs, and fall out of trees.”

“I'm a writer and I'm feeling like death, as you would too if you'd just flown into Grand Rapids, Michigan at some ungodly hour of the morning only to discover that you can't get into your hotel room for another three hours. In fact it's enough just to have flown into Grand Rapids, Michigan. If you are a native of Grand Rapids, Michigan, then please assume that I am just kidding. Anyone else will surely realise that I am not.Having nowhere else to go, I am standing up, leaning against a mantelpiece. Well, a kind of mantelpiece. I don't know what it is, in fact. It's made of brass and some kind of plastic and was probably drawn in by the architect after a nasty night on the town. That reminds me of another favourite piece of information: there is a large kink in the trans-Siberian railway because when the Czar (I don't know which Czar it was because I am not in my study at home I'm leaning against something shamefully ugly in Michigan and there are no books) decreed that the trans-Siberian railway should be built, he drew a line on a map with a ruler. The ruler had a nick in it.”

“This planet has - or rather had - a problem, which was this: most of the people living on it were unhappy for pretty much of the time. Many solutions were suggested for this problem, but most of these were largely concerned with the movement of small green pieces of paper, which was odd because on the whole it wasn't the small green pieces of paper that were unhappy.”

“I've heard an idea proposed, I've no idea how seriously, to account for the sensation of vertigo. It's an idea that I instinctively like and it goes like this. The dizzy sensation we experience when standing in high places is not simply a fear of falling. It's often the case that the only thing likely to make us fall is the actual dizziness itself, so it is, at best, an extremely irrational, even self-fulfilling fear. However, in the distant past of our evolutionary journey toward our current state, we lived in trees. We leapt from tree to tree. There are even those who speculate that we may have something birdlike in our ancestral line. In which case, there may be some part of our mind that, when confronted with a void, expects to be able to leap out into it and even urges us to do so. So what you end up with is a conflict between a primitive, atavistic part of your mind which is saying "Jump!" and the more modern, rational part of your mind which is saying, "For Christ's sake, don't!" In fact, vertigo is explained by some not as the fear of falling, but as the temptation to jump!”

“I only know as much about myself as my mind can work out under its current conditions. And its current conditions are not good.”

“What, are you, crazy?' 'It's a possibility I haven't ruled out yet', said Zaphod quietly. 'I know as much about myself as my mind can work out under its current conditions. And its current conditions are not good.”