Carlos Ruiz Zafón said this quote

“ Without further ado I left the place, finding my route by the marks I had made on the way in. As I walked in the dark through the tunnels and tunnels of books, I could not help being overcome by a sense of sadness. I couldn't help thinking that if I, by pure chance, had found a whole universe in a single unknown book, buried in that endless necropolis, tens of thousands more would remain unexplored, forgotten forever. I felt myself surrounded by millions of abandoned pages, by worlds and souls without an owner sinking in an ocean of darkness, while the world that throbbed outside the library seemed to be losing its memory, day after day, unknowingly, feeling all the wiser the more it forgot. ”