“[He's] a rat. A first-class double-A-battery-run rat.”

“Did you bring me a rat?""He has no time for rats, George.""No time for rats? That's just sad.”

“I always say the truth is best even when we find it unpleasant. Any rat in a sewer can lie. It's how rats are. It's what makes them rats. But a human doesn't run and hide in dark places, because he's something more. Lying is the most personal act of cowardice there is.”

“I dare say it is rather hard to be a rat,” she mused. “Nobody likes you. People jump and run away and scream out: ‘Oh, a horrid rat!’ I shouldn’t like people to scream and jump and say: ‘Oh, a horrid Sara!’ the moment they saw me, and set traps for me, and pretend they were dinner. It’s so different to be a sparrow. But nobody asked this rat if he wanted to be a rat when he was made. Nobody said: ‘Wouldn’t you rather be a sparrow?”

“The rat turned his glowing eyes on him, and Gregor was shocked by what he saw there. The intelligence, the deadliness, and, most surprisingly, the pain. This rat was not like Fangor and Shed. He was much more complicated and much more dangerous. For the first time in the Underland, Gregor felt completely out of his league. If he fought this rat, he wouldn't stand a change. He would lose. He would be dead.”

“When I took Psychology 101, the professor taught us about random reinforcement. Put threegroups of rats in three separate cages, each equipped with a bar. The first group of rats got a pellet every time they pressed the bar. The second group never got pellets, no matter how often they pressed. And the third group got pellets just once in a while.The first group, the professor said, eventually gets bored with the guaranteed reward and the rats who never get treats give up, too. But the random rats will press on that bar forever, hoping each time they press that this time the magic will happen, that this time they’ll get lucky. It was at that moment in class that I realized that I had become my father’s rat.”