Shall sun that morrow see!
Your face, my Thane, is as a book where men
May read strange matters. To beguile the time,
Look like the time; bear welcome in your eye,
Your hand, your tongue: look like th' innocent flower,
But be the serpent under't. He that's coming
Must be provided for: and you shall put
This night's great business into my dispatch;
Which shall to all our nights and days to come
Give solely sovereign sway and masterdom.
(Lady Macbeth to Macbeth, "Macbeth," Act 1, Scene 5, lines 62-71)