“For there is a growing apprehension that existence is a rat-race in a trap: living organisms, including people,are merely tubes which put things in at one end and let them out at the other, which both keeps them doing it and in the long run wears them out. So to keep the farce going, the tubes find ways of making newtubes, which also put things in at one end and let them out at the other. At the input end they even develop ganglia of nerves called brains, with eyes and ears, so that they can more easily scrounge around for things to swallow. As and when they get enough to eat, they use up their surplus energy by wiggling in complicated patterns, making all sorts of noises by blowing air in and out of the input hole, and gathering together in groups to fight with other groups. In time, the tubes grow such anabundance of attached appliances that they are hardly recognizable as mere tubes, and they manage to do this in a staggering variety of forms. There is a vague rule not to eat tubes of your own form, but in general there is serious competition as to who is going to be the top type of tube. All this seems marvelously futile, and yet, when you begin to think about it, it begins to be more marvelous than futile. Indeed, it seems extremely odd.”

“Put Smarties tubes on cats legs, make them walk like a robot.”

“There was a pumping noise which Isaac knew to mean that the toxins had been released. Someone checked the needles and the tubing which had been inserted into his wrists and Isaac saw the thin, clear tubes begin to carry poisonous liquid into his veins.”

“Victor eyed the glistening tubes in the tray around Dibbler's neck. They smelled appetizing. They always did. And then you bit into them, and learned once again that Cut-me-own-Throat Dibbler could find a use for bits of an animal that the animal didn't know it had got. Dibbler had worked out that with enough fried onions and mustard people would eat anything.”

“She looked up. "What I can't figure out is why the good things always end.""Everything ends.""Not some things. Not the bad things. They never go away.""Yes, they do. If you let them, they go away. Not as fast as we'd like sometimes, but they end too. What doesn't end is the way we feel about each other. Even when you're all grown up and somewhere else, you can remember what a good time we had together. Even when you're in the middle of bad things and they never seem to be changing, you can remember me. And I'll remember you.”

“I like to hike in state parks, but one thing I can’t stand is pants. So I don’t wear any. My wallet is tube shaped. Can you guess where I keep it?”