What Phillips likes best, however, is wordplay. Inversion, circumlocution, alliteration, assonance, chiasmus, paradox: there’s nothing he doesn’t go in for. “The unexamined life is surely worth living, but is the unlived life worth examining?”
One well-known example of chiasmus is Quintillian's purported phrase "one does not (a) live to (b) eat; one (b) eats to (a) live." ... Other examples are Mae West's "it's not the men in my life [that matter], it's the life in my men." And then there is President John F. Kennedy's famous phrase, "ask not what your country can do for you; ask what you can do for your country."