Good Clean Logo Design Wanted

Don't tell me that you can do this job, Show Me evidence from your previous work.

Hint: Can you make a good and clean logo that conveys an individual's mental strength?
You know that a CLENCHED FIST is the simplest way for people to show physical strength in a drawing or design.
Are you creative enough to find a way to show mental strength in a drawing or design?
That's precisely what I want you to do in this task.