Chiasmus

In rhetoric, chiasmus (/kaɪˈæzməs/ ky-AZ-məs) or, less commonly, chiasm (Latin term from Greek χίασμα chiásma, "crossing", from the Greek χιάζω, chiázō, "to shape like the letter Χ"), is a "reversal of grammatical structures in successive phrases or clauses – but no repetition of words".

A similar device, antimetabole, also involves a reversal of grammatical structures in successive phrases or clauses in an A-B-B-A configuration, but unlike chiasmus, presents a repetition of words.

Chiasmus balances words or phrases with similar, though not identical, meanings:

But O, what damned minutes tells he o'er
Who dotes, yet doubts; suspects, yet strongly loves.

— Shakespeare, Othello 3.3

"Dotes" and "strongly loves" share the same meaning and bracket, as do "doubts" and "suspects".

Additional examples of chiasmus:

By day the frolic, and the dance by night.