Rick Yancey said this quote

That's my name. Not Cassie for Cassandra. Or Cassie for Cassidy. And it's not Cassie for Cassiopeia. Not anymore. I am more than her now.I am all of them, Evan and Ben and Marika and Megan and Sam. I am Dumbo and Poundcake and Teacup. I am all the ones you emptied, the ones you corrupted, the ones you discarded, the thousands you thought you killed, but who live in me.But I am more than this. I am all those they remember, the ones they loved, everyone they knew, and everyone they only heard about. How many are contained in me? Count the stars. Go on, number the grains of sand. That's me.I am humanity.