On the Power of Her Beauty

I am lighthearted now. An hour ago
There was a tempest in my heaven, a flame
Of sullen lightning under a bent brow
And a dull muttering which breathed no name.
Now all is changed. The very winds are tame, 
And the birds sing aloud from every bough,
And my heart leaps. What empire dost thou claim, 
Child, o’er this Earth, that nature serves thee so? 
Sublime magician! Well may Earth and Heaven 
Change at thy bidding, and the hearts of men. 
Didst thou but know the power that beauty hath, 
The sea should leave his bed, the rocks be riven, 
And wise men, deeming chaos come again, 
Should kneel before thee and conjure thy wrath.