How does Shakespeare use natural imagery in Sonnet 18 to contrast the fleeting nature of life with the permanence of poetry?

In what ways does this comparison emphasize the theme of immortalizing love, and how does it differ from other Renaissance depictions of love and mortality? I've been researching English sonnets from the Elizabethean era and am trying to compare Sonnet 18, which portrays a romantic/courtly love with poetry during that time that reference love as a more divine and eternal force. How does Shakespeare's treatment of love in this sonnet stand apart from these other religious interpretations of love, and what does this reveal about shifting perspectives on love during the Renaissance?