Catharsis is the sudden release of emotions when you let yourself be wrapped up in them. Falling into emotion.
It's a very deep theme, but we can definitely use it, since everyone has felt catharsis sometime in their lives.
We can work on these questions:
Do we ever need catharsis?
Can we create catharsis on ourselves?
Haw many times can we get catharsis from the same thing?
Using catharsis on others.
Can catharsis liberate us?
Can catharsis trap us?
Can something superficial cause catharsis?