“The way Calvin's brain is wired you can almost hear the fuses blowing.”

“The only permanent rule in Calvinball is that you can never play it the same way twice! (Calvin)”

“I found it very difficult to feel easy around the guy, even once I'd got used to the shock of his presence. It's a strange feeling...the first time you meet him your brain wants to scream, blow a fuse and shut itself down immediately, refusing to accept that he exists. This lasts for a couple of minutes, at which time he's still there and hasn't gone away, and in the end you just accept him because he's standing there and talking to you and after a while it almost seems normal. Almost.”

“Life is a monster, Calvin. Especially when it doesn't turn out the way you hoped. But that doesn't mean you can hide from it.”

“It is this kindness of his that unsettles me most. I can dodge a blow or block a knife. I am impervious to poison and know a dozen ways to escape a chokehold or garrote wire. But kindness? I do not know how to defend against that.”

“Yuki: "Is your brain directly wired to perversion?”