“There are four things you need to know about war. One, every action requires careful tactics. Two, never lose hope and fight only for what is right. Three, be brave but you don't have to be fearless. And four, be willing to sacrifice.”

“The only thing that beats One is two, and three, and four.”

“One, and two, and three, four, five. Keep fighting like this and you will die," Janco sang.”

“Only five books tonight, Mommy," she says.No, Olivia, just one."How about four?"Two."Three."Oh, all right, three. But that's it!”

“I don't understand dating.. and the other things that people do.. all I know is that you ought to find the one you recognize. The one who gives you four arms, four legs, four eyes, and has the other half of your heart. There's only one of those, so what are all the other things for? Like dating?”

“Numbers still gave Astrid pleasure. That was the great thing about numbers: it required no faith to believe that two plus two equaled four. And math never, ever condemned you for your thoughts and desires.”