How does this passage develop the theme "evil can never truly hide itself”? dr. jekyll tells the men to go away before slamming the window closed. dr. jekyll closes the window and makes the men nervous by following them home. utterson and enfield are horrified when they see jekyll’s transformation. utterson and enfield are ashamed that they did not stay to dr. jekyll.

Jekyll believed that man does not have one side ‘but truly two’. He asserts that human soul struggling for mastery is a battleground for a “fiend” and an “angel”. Therefore, it can be separated by bringing the dark side into being. :)

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figurative language is a resource that fiction writers use to make better descriptions of what they want to write about or express. they can improve their stories, as they can elaborate more vivid and colorful sentences. this way, the reader will be able to have more detailed images in his/her mind.

places, objects, people and even feelings or emotions can be described with a lot of detail to metaphors, similes and personifications. making different kinds of comparisons to make a description more specific, as well as assigning human qualities to non-human objects (and vice-versa) can be very useful for science fiction writers.  

on the other hand, alliterations allow writers to elaborate more entertaining and creative sentences. it consists in using a sequence of words that start with the same consonant letter. they can be used to emphasize something important the writer wants to express, or just as a fun literary device.