Thy friends suspect for traitors while thou liv'st,
And take deep traitors for thy dearest friends!
No sleep close up that deadly eye of thine,
Unless it be while some tormenting dream
Affrights thee with a hell of ugly devils!"

The witch, in "Macbeth," cataloguing the calamities in store for the
ambitious Thane, says:

"Sleep shall neither night nor day
Hang upon his pent-house lid;
He shall live a man forbid."

It is curious also to remark, in the various lists of griefs which make
life a burden and a sorrow, how often the climax of these woes is the
lack of sleep, or the troubled dreams bearing their train of "gorgons,
hydras, and chimeras dire," which come with broken rest. Lady Percy says
to Hotspur:--

"Why hast thou lost the fresh blood in thy cheeks,
And given my treasures and my rights of thee
To thick-eyed musing and curst melancholy?
Tell me, sweet lord, what is't that takes from thee
Thy stomach, pleasure, and thy golden sleep?"

Macbeth says:--

"But let the frame of things disjoint, both the worlds suffer,
Ere we will eat our meal in fear, and sleep
In the affliction of these terrible dreams