Until you open your hand

You will not sleep, if you lie there a thousand

years, until you have opened your hand and

yielded that which is not yours to give or to 

withhold. You may think you are dead, but

it will be only a dream; you may think you

have come awake, but it will still be only a

dream. Open you hand, and you will sleep

indeed – then wake indeed.

- Lilith, Chapter 40, by George MacDonald

(Quoted in the beginning of Book 9 

of The Pilgrim's Regress by CS Lewis)