Assertion: sonnet's quatrain | /r/CapableOf | introduce sarcastic mock humility
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text: The poet's strategy in this sonnet is to portray himself as ignorant and lacking in talent, but the second quatrain in lines 5 and 6 introduces sarcastic mock humility, by the ridiculousness of the image of croaking ("taught the dumb on high to sing"), paired with the image of heavy objects flying about ("heavy ignorance aloft to fly").