What is the structural feature of chiasmus?

Chiasmus is characterized by a reversal of structure in parallel statements. This rhetorical device involves inverting the order of words or phrases in one part of a sentence and then repeating them in reverse order in the next part. This creates a mirror-like effect that enhances the emphasis on the concepts being expressed and can add a poetic quality to the language.

For instance, in the phrase "Never let a Fool Kiss You or a Kiss Fool You," the structure is reversed in the second half to create a compelling rhythm and meaning. The strength of chiasmus lies in its ability to create memorable expressions and to highlight contradictions or contrasts within the statements, making the message more impactful.