How does figurative language impact the meaning of an author's intended purpose?

Figure of Speech (or stylistic device or rhetorical device) is using of different styles to complement an idea, feeling or meaning. These speeches give importance, newness of expression, or clearness. The following are the figures of speeches: Synecdoche, Anastrophe, Anaphora, Antonomasia, Personification, Simile, Analogy, Metaphor, Alliteration, Euphemism, Assonance, Idiom, Funny Metaphors, Jargon, Double Negative, Anadiplosis, Appositive, Enthymeme, Parallelism,  Adjunction, Antithesis, Apostrophe, Climax, Metonymy, Oxymoron, Litotes, Paralipsis, Hyperbole, Onomatopoeia, Imagery, Symbol, Pun, Allegory, Tautology, Rhetoric, Zeugma, Anticlimax, Consonance, Irony, Polysyndeton, Rhetorical Question, Asyndeton, Parenthesis, Antimetabole, Epistrophe, Understatement, Chiasmus, Epithet and False Analogy.  

Hist con- A
personal backg- B
hist imp-C
aud and purp -D