To Say What One Means but to Mean what One Doesn’t Say
or as Bart Simpson put it… “Damned if you do, damned if you don’t.”
That’s giving examples of a paradox. The paradox is the flipside, the standard by which one discovers oxymorons.
As that is Oxymoronica details, chronicles, lists a good number of paradoxical sayings and lists common oxymorons, which are phrases.
Thanks to The Commisar for the tip.