Smaug certainly looked asleep, almost dead and dark, with scarcely a snore more than a whiff of unseen steam, when Bilbo peeped once more from the entrance. He was just about to step out onto the floor when he caught a sudden thin ray of red from under the drooping lid of Smaug's left eye. He was only pretending to sleep! He was watching the tunnel entrance!
J. R. R. TolkienThe world is indeed full of peril, and in it there are many dark places; but still there is much that is fair, and though in all lands love is now mingled with grief, it grows perhaps the greater.
J. R. R. Tolkien