What is the theme of the poem the self-unseeing

Death and decay is one of the themes

byron utilizes literary techniques to emphisize the illustration of the woman in the poem “she walks in beauty”.

for instance, he uses alliteration to use repetitive consonant sounds when he is writing a word at the beginning of a phrase. he uses personification to give personality to a thing or action. he uses imagery when he is describing the woman. we also can find metaphors to better compare a moment.

these techniques add to the reader’s experience of beauty when the author describes the woman physical beauty and the purity of her mind, using imagery.  

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yes the first one is correct .