“A towel, [The Hitchhiker's Guide to the Galaxy] says, is about the most massively useful thing an interstellar hitchhiker can have. Partly it has great practical value. You can wrap it around you for warmth as you bound across the cold moons of Jaglan Beta; you can lie on it on the brilliant marble-sanded beaches of Santraginus V, inhaling the heady sea vapors; you can sleep under it beneath the stars which shine so redly on the desert world of Kakrafoon; use it to sail a miniraft down the slow heavy River Moth; wet it for use in hand-to-hand-combat; wrap it round your head to ward off noxious fumes or avoid the gaze of the Ravenous Bugblatter Beast of Traal (such a mind-boggingly stupid animal, it assumes that if you can't see it, it can't see you); you can wave your towel in emergencies as a distress signal, and of course dry yourself off with it if it still seems to be clean enough.”
“Wet towel under the door,' said Barry. 'It's what you do when you're smoking weed in a hotel and you don't want everyone calling security. You're always supposed to have a towel. I read about it in a guide for hitchhiking through the galaxy.”
“...If you work hard enough and assert yourself, and use your mind and imagination, you can shape the world to your desires. (151)”
“On a night without moon or stars you can't see a thing, but you can imagine anything.”
“Open your eyes, train your ears, use your head. If a mind you have, then use it while you can.”
“When the tides change, you have two choices. You can either stand there, letting the water wash over you and your feet sink deeper into the wet sand... or you can get out of the way. You can move up the beach - or off the beach, if you want. The point is to not get stuck.”