An Analysis of William Shakespeare's Sonnet 130

Sonnet CXXX is yet another love sonnet that’s Shakespeare has written although it’s a pleasure to read for its simplicity and frankness of expression. Its message is simple and direct which is the dark lady's beauty cannot be compared to the beauty of a goddess or to that found in nature, for she is but a mortal human being This is what made the poem memorable and famous which is for its blunt but charming sincerity.
"I grant I never saw a goddess go; / My mistress, when she walks, treads on the ground." Here the poet explicitly states that his mistress is not a goddess but like any other ordinary human that walks on the ground.
She is also not as beautiful as things found in nature, "My mistress' eyes are nothing like the sun;” “Coral is far more red than her lips' red." Yet the narrator loves her nonetheless and in the closing couplet says that in fact she is just as extraordinary ("rare") as any woman described with such exaggerated or false comparisons
If snow /be white,/ why then/ her breasts/ are dun; Note the proper iambic pentameter structure.
That music hath a far more pleasing sound; Assonance; the "a" sound is repeated three times in this line.
I grant I never saw a goddess go; Alliteration; the hard "g" sound is repeated three times in this line.
My mistress, when she walks, treads on the ground:
And yet, by heaven, I think my love as rare IRONY Note the rhyme scheme of the couplet; gg. The turn, or volta occurs here when Shakespeare stops finding faults with his lover and resolves the poem saying that no one is perfect and he still loves her.