antimetabole

In rhetoric, antimetabole ( ) is the repetition of words in successive clauses, but in transposed order; for example, "I know what I like, and I like what I know". It is related to, and sometimes considered a special case of, chiasmus.

An antimetabole can be predictive, because it is easy to reverse the terms. It may trigger deeper reflection than merely stating one half of the line.