Definition: Chiasmus is a rhetorical device where one clause is repeated, but in a reverse order. Most of the time, the clause uses the same grammar and word choice, but just in a reversed way. However, sometimes the clause or concept can be slightly modified when reversed.
Example: “The instinct of a man is to pursue everything that flies from him, and to fly from all that pursues him.” (Voltaire)
"How to Write Memorable Speech Lines (Chiasmus)." Six Minutes. N.p., n.d. Web. 04 Apr. 2017. <http://sixminutes.dlugan.com/chiasmus/>.