Marie Lu said this quote

We might not return from this voyage. None of us. We might all lay down our lives when we reach the end, and not ever know whether our sacrifice changed anything for the better.”“It will be for the better,” Magiano replies. “We cannot just die, not without trying. Not without fighting.”“Do you really believe that?” I ask. “Why are we doing this, anyway? To preserve my own life, and yours—but what has the world ever done for us in order to deserve our sacrifice?”Magiano’s brows furrow for a moment, then he leans in closer. “We exist because this world exists. It’s a responsibility of ours, whether or not anyone will remember it.” He nods at me. “And they will. Because we will return and make sure of it.