In the Tempest, Act I. Scene 2, when Prospero is telling his history to Miranda, there is one of these little enigmas which lie in our poet like the veil sometimes thrown over the intentions of nature, known only to those who study her habitually.

Prospero. Thy false uncle—

Dost thou attend me?

Miranda. Sir, most heedfully.

Pro. Being once perfected how to grant suits,

How to deny them; whom to advance, and whom

To trash for over-topping: new created

The creatures that were mine, I say, or chang’d ’em,

Or else new form’d ’em: having both the key

Of officer and office, set all hearts i’ the state