Art thou some god, some angel, or some devil,

That mak’st my blood cold, and my hair to stare?—

Speak to me what thou art.

Julius Caesar, Act iv., Sc. 3.

Lady Macbeth. Alack! I am afraid they have awak’d,

And ’tis not done. The attempt, and not the deed,

Confounds us. Hark!—I laid their daggers ready,

He could not miss them.—Had he not resembled

My father as he slept, I had done ’t. My husband!

Macbeth. I have done the deed. Didst thou not hear a noise?