A chiastic literary structure presents themes or characters in symmetrical pattern, resembling the Greek letter "chi" (X) or (A-B-C-C'-B'-A'). This can make it easier to remember.
President [[John F. Kennedy]]'s famous line from his [[Inaugural Day|Inaugural]] speech was chiastic: "Ask not what your country can do for you, ask what you can do for your country." Indeed, it was easy to remember and repeat.
The [[Book of Leviticus]] in the [[Bible]] is structured chiastically.
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[[category:literature]]