“Humans can't tolerate emptiness for long.”

“His absence will haunt their hallways, and he will be a space they can't fill. And then time will pass, and the hole will be gone, like when an organ is removed and the body's fluids flow into the space it leaves. Humans can't tolerate emptiness for long.”

“I can't tell him I need him. I can't need him, period -- or really, we can't need each other, because who knows how long either of us will last in this war?”

“Human beings as a whole cannot be good for long before the bad creeps back in and poisons us again.”

“I don't see any elderly people in the crowd. Are there any old Dauntless? Do they not last that long, or are they just sent away when they can't jump off moving trains anymore?”

“I would rather be dead than empty”

“I hear my heartbeat. I have been looking at him too long, but then, he has been looking back, and I feel like we are both trying to say something the other can't hear, though I could be imagining it. Too long - and now even longer, my heart even louder, his tranquil eyes swallowing me whole.”