Oh, the terrible struggle that I have had against sleep so often of late; the pain of the sleeplessness, or the pain of the fear of sleep, and with such unknown horror as it has for me! How blessed are some people, whose lives have no fears, no dreads; to whom sleep is a blessing that comes nightly, and brings nothing but sweet dreams.
– Bram Stoker
Dracula, Chapter 11. Lucy Westenra is going through a very scary supernatural experience after being preyed upon by Dracula several times. She is thinking about how fear has become something linked with fear and pain, instead of peace and rest.