The quotation from 'A Hymn to the Evening' contains a metaphor, where sleep is portrayed as a rejuvenating experience that enhances the mind upon waking. This figure of speech emphasizes the transformative power of restful sleep. Thus, the correct answer is 'metaphor.'
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The lines from 'A Hymn to the Evening' exemplify a metaphor, suggesting a transformation in the mind through restful sleep. In poetry, recognizing figures of speech like metaphors enhances understanding of deeper meanings. The correct answer is therefore 'metaphor.' ;