" What is it with you today?” says Christina on the way to breakfast. Her eyes are still
swollen from sleep and her tangled hair forms a fuzzy halo around her face.
“Oh, you know,” I say. “Sun shining. Birds chirping.”
She raises an eyebrow at me, as if reminding me that we are in an underground
tunnel. "

― Veronica Roth , Divergent (Divergent, #1)