This planet has — or rather had — a problem, which was this: most of the people living on it were unhappy for pretty much all of the time.

A mobile phone needs a manual in the way that a teacup doesn't

I don't like the idea of missionaries. In fact, the whole business fills me with fear and alarm. I don't believe in God, or at least not in the one we've invented for ourselves in England to fulfill our peculiarly English needs, and certainly not in the ones they've invented in America who supply their servants with toupees, television stations and, most importantly, toll-free telephone numbers. I wish that people who did believe in such things would keep them to themselves and not export them to the developing world.

If there was one thing life had taught her it was that there are times when you do not go back for your bag and times when you do. It had yet to teach her to distinguish between the two types of occasion.

...and the Universe, ... will explode later for your pleasure.

Protect me from knowing what I don't need to know. Protect me from even knowing that there are things to know that I don't know. Protect me from knowing that I decided not to know about the things that I decided not to know about. Amen. [...] Lord, lord, lord. Protect me from the consequences of the above prayer.

Was there a reason behind it? There would be no point in asking Zaphod, he never appeared to have a reason for anything he did at all: he had turned unfathomability into an art form. He attacked everything in life with a mixture of extraordinary genius and naive incompetence and it was often difficult to tell which was which.