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And pleas'd with our soft peace, stayed here his flying race. Where with most ease and warmth he might employ his art: Deceiv'd the quaking boy, who thought from so pure light. But she most fair, most cold, made him thence take his flight
The stylistic element used in the passage is incongruity. It is a form of satire or humor. Incongruity is used in an unsuitable time. For example, If a man were in a court room and belched loudly while receiving his sentence, that would be a use of incongruity. Another example would be if at a royal wedding the groom's pants fell down in the middle of the ceremony.
While she slept, the mother was oblivious to the exploits of her children.
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