Sleep... the devil's work
For where else can all our dreams be satisfied?
Where else is it safe to roll over and feel your warmth pressed against me,
Quiet, and not in battle?
You say no one knows the real you...
But in sleep,
It's all defined.

From the famous "to be or not to be" soliloquy in Hamlet.

"To die, to sleep --
To sleep, perchance to dream: ay, there's the rub,
For in that sleep of death what dreams may come
When we have shuffled off this mortal coil,
Must give us pause."

Hamlet - William Shakespeare Act III Scene 1