Thy various works, imperial queen, we see,
How bright their forms! how deck'd with pomp by thee!
Thy wond'rous acts in beauteous order stand,
And all attest how potent is thine hand.
From Helicon's refulgent heights attend,
Imagination brightens and bedecks ordinary things, as if with fine clothes and accessories, thereby rendering them extraordinary. 
 The poem consists of a series of rhymed iambic pentameter couplets, a.k.a.  “heroic couplets.”  This was the form favored by  Alexander Pope,  arguably the most famous and widely imitated poet in English in the 18th century. Pope wrote “the style of the age” and was the major influence on Wheatley’s own style.
On Imagination