The car shot forward straight into the circle of light, and suddenly Arthur had a fairly clear idea of what infinity looked like. It wasn’t infinity in fact. Infinity itself looks flat and uninteresting. Looking up into the night sky is looking into infinity—distance is incomprehensible and therefore meaningless. The chamber into which the aircar emerged was anything but infinite, it was just very very very big, so big that it gave the impression of infinity far better than infinity itself.

A beach house isn't just real estate. It's a state of mind.

I don't really have any advice, other than to say it's the most appallingly difficult thing I've ever tried to do and I wish I had a better idea of how to do it. In my experience what you end up with is the by-product of your failure to achieve what you set out to do. It may turn out OK, but it wasn't what you meant and you've no idea how you got there.

There was a point to this story, but it has temporarily escaped the chronicler's mind.

R is a velocity of measure, defined as a reasonable speed of travel that is consistent with health, mental well-being, and not being more than, say, five minutes late. It is therefore clearly as almost infinite variable figure according to circumstances, since the first two factors vary not only with speed as an absolute, but also with awareness of the third factor. Unless handled with tranquility, this equation can result in considerable stress, ulcers, and even death.

Trillian had come to suspect that the main reason [Zaphood] had had such a wild and successful life was that he never really understood the significance of anything he did.

They live in perpetual fear of the time they call "The Coming of the Great White Handkerchief