We have normality. I repeat, we have normality. Anything you still can't cope with is therefore your own problem.

Zaphod felt he was teetering on the edge of madness and wondered if he shouldn't just jump over and have done with it.

A theory of the universe that states: If anyone finds out what the universe is for, it will disappear and be replaced by something more bizarrely inexplicable.

In those days spirits were brave, the stakes were high, men were real men, women were real women and small furry creatures from Alpha Centauri were real small furry creatures from Alpha Centauri.

Technology is the name we give to stuff that doesn't work properly yet

Exactly!" said Deep Thought. "So once you do know what the question actually is, you'll know what the answer means.

'The difficulty with this conversation,' said Arthur after a sort of pondering look had crawled slowly across his face like a mountaineer negotiating a tricky outcrop, 'is that it's very different from most of the ones I've had of late. Which, as I explained, have mostly been with trees.'