Joining two words of opposite meaning in a single short phrase, such as "sweet bitterness".
In The Red and the Black
In fact, his enthusiasm was somewhat deliberate. Passionate love, more than a reality, was still a model that one imitated.
The phrase "his enthusiasm was somewhat deliberate" joins what is spontaneous and what is planned, and the clash between the two ideas reveals that Mathilde's passion is, in part, the staging of a model.