My mistress' eyes

"My mistress' eyes are nothing like the sun"

I thought this poem was interesting, because I think it addresses the issue of love cliches.  Commonplace in poetry is drawing comparisons about love using things like the sun or snow.  The speaker contrasts all of this by saying his mistress is nothing like this.  This, in a way, gives the realistic tone impression of an lifeless, dull lover, but in the last lines the speaker still proclaims his love to be rare.  So, the love isn't meaningless and the mistress is worthy of admiration.  The speaker says the mistress is as lovely as those "belied with false compare," or those blasted with cliche love similes and metaphors. The tone, along with realism, could be criticism of love sayings.