“I imagine it's hard to go back once you've felt the continents in your palm.”

“I mean, creatures who only exist in the dark don't know they're missing the sun, right? But once you've seen the sun. Once you've seen it light up the world ... once you've felt its heat all around you ... inside you ..." He clutched his own chest, and my heart cracked open. "Its hard to live in the dark after the sun dies.”

“It's hard to imagine her ever having felt lost, but it's impossible to know the people your parents were before they were your parents.”

“Once the blinders are off, it's rather hard to go back to seeing things the way you used to.”

“It felt like I'd been living underground, and for a moment, I'd been given this glimpse of the sky. Once you've seen that, how can you go back where you came from?”

“It's not the letter she imagined she would write, but once you start, all the other letters you've ever written in your life have a way of creeping in.”