"Finally, from so little sleeping and so much reading, his brain dried up and he went completely out of his mind.” (Miguel de Cervantes Saavedra, Don Quixote)
Lady Macbeth learned from Machiavelli
Lady Macbeth:
[...] 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.
