Chiasmus

In rhetoric, chiasmus or, less commonly, chiasm (Latin term from Greek χίασμα, "crossing", from the Greek χιάζω, chiázō, "to shape like the letter Χ") is the figure of speech in which two or more phrases are presented, then presented again in reverse order to make a larger point. To diagram a simple chiasmus, the phrases are often labelled A B B A. For example, John F. Kennedy said, "ask not what your country can do for...