Joo Janta 200 Super-Chromatic Peril Sensitive Sunglasses have been specially designed to help people develop a relaxed attitude to danger. At the first hint of trouble, they turn totally black and thus prevent you from seeing anything that might alarm you.

Space is really big-REALLY big.

The Hitch-Hiker's Guide to the Galaxy also mentions alcohol. It says that the best drink in existence is the Pan Galactic Gargle Blaster, the effect of which is like having your brains smashed out with a slice of lemon wrapped round a large gold brick.

And then, one Thursday, nearly two thousand years after one man had been nailed to a tree for saying how great it would be to be nice to people for a change, a girl sitting on her own in a small café in Rickmansworth suddenly realized what it was that had been going wrong all this time, and she finally knew how the world could be made a good and happy place. This time it was right, it would work, and no one would have to get nailed to anything.

He almost danced to the fridge, found the three least hairy things in it, put them on a plate and watched them intently for two minutes. Since they made no attempt to move within that time he called them breakfast and ate them. Between them they killed a virulent space disease he'd picked up without knowing it in the Flargathon Gas Swamps a few days earlier, which otherwise would have killed off half the population of the Western Hemisphere, blinded the other half, and driven everyone else psychotic and sterile, so the Earth was lucky there.

Marvin started his ironical humming again. Zaphod hit him and he shut up.

Don't you understand that we need to be childish in order to understand? Only a child sees things with perfect clarity, because it hasn't developed all those filters which prevent us from seeing things that we don't expect to see.