Question

How does the structure of this Italian sonnet by Petrarch support its theme?

Those eyes, 'neath which my passionate rapture rose
The arms, hands, feet, the beauty that erewhile
Could my own soul from its own self beguile
And in a separate world of dreams enclose
The hair's bright tresses, full of golden glows,
And the soft lightning of the angelic smile
That changed this earth to some celestial isle
Are now but dust, poor dust, that nothing knows
And yet I live! Myself I grieve and scorn,
Left dark without the light I loved in vain
Adrift in tempest on a bark forlorn
Dead is