Definition
Chiasmus is a rhetorical device in which two or more clauses are balanced against each other by the reversal of their structures in order to produce an artistic effect. It's like saying, 'Ask not what your country can do for you—ask what you can do for your country.' The structure AB, BA is mirrored. This technique creates a memorable and balanced effect, emphasizing the relationship between the two parts. Think of it as a literary X, connecting two ideas in a crisscross pattern.