“Because we're grown-ups now, and its our turn to decide what that means.”

“No avian society ever develops space travel because it's impossible to focus on calculus when you could be outside flying.”

“I have never been able to understand the complaint that a story is "depressing" because of its subject matter. What depresses me are stories that don't seem to know these things go on, or hide them in resolute chipperness; "witty stories," in which every problem is the occasion for a joke; "upbeat" stories that flog you with transcendence. Please. We're grown ups now.”

“It's a no-win argument - that business of what we're born with and what our environment does to us. And it's a boring argument, because it simplifies the mysteries that attend both our birth and our growth.”

“We'll squeeze every second that we can from our lives, because we're young, and we have plenty of years to grow. We'll grow until we're braver. We'll grow until our bones ache and our skin wrinkles and our hair goes white, and until our hearts decide, at last, that it's time to stop.”

“Miles: Well, things are kind of complicated right now. When you’re a grown-up, you’ll understand.Jonah: I don’t want to be a grown-up.Miles: Why not?Jonah: Because grown-ups always say that things are complicated.”

“Sometimes when we forget to do things for others, it's because we're too wrapped up in our own problems.”