Simple and direct:
* The paradox is that the more you try to control your thoughts, the less you actually control them.
* It's a paradox that being completely honest can sometimes hurt more than lying.
More descriptive:
* The philosopher presented a fascinating paradox about the nature of free will, arguing that we are both free and determined at the same time.
* Her life was a paradox of both immense wealth and deep loneliness.
With a bit more context:
* The paradox of technology is that it can both connect us and isolate us at the same time.
* The movie explores the paradox of love and loss, showing how the two can be inextricably intertwined.
Remember: A paradox is a statement that seems contradictory or absurd but may be true.