Simple:
* The artist sought to capture the permanence of the mountain range in her painting.
* Despite the constant changes in fashion, the basic principles of design seem to have a certain permanence.
* The inscription on the tombstone promised eternal permanence.
Figurative:
* The lovers vowed their love would have permanence despite the challenges they faced.
* The memories of their childhood held a special permanence in their hearts.
* The city's skyline seemed to embody a sense of permanence and stability.
Contrasting:
* The inscription on the tombstone promised eternal permanence, but the stone itself was slowly being eroded by the weather.
* He craved the permanence of a stable career, but his restless nature made it difficult to find one.
In a formal context:
* The committee discussed the permanence of the proposed changes to the curriculum.
* The study investigated the psychological effects of permanence and transience on memory.
The best way to use "permanence" in a sentence will depend on the context and the specific meaning you want to convey.