"Fairest of mortals, thou distinguish'd care." This line was written by -

 "Fairest of mortals, thou distinguish'd care
Of thousand bright inhabitants of air!
If e'er one vision touch'd thy infant thought,
Of all the nurse and all the priest have taught,
Of airy elves by moonlight shadows seen,
The silver token, and the circled green,
Or virgins visited by angel pow'rs,
With golden crowns and wreaths of heav'nly flow'rs,
Hear and believe! thy own importance know."

The Rape of the Lock: Canto 1
By Alexander Pope.