There are two opinions:
  1. Most people believe to go through something challenging or devastating and to survive it and evolve from it is an indication of mental strength or bravery.
  2. But I think to go through something and remain the exact same as you were prior is true mental strength.
I think both of the following statements are true, depending on the circumstances.
  1. This could refer to experiences that are difficult but provide opportunities for growth and develop. It could be mistakes we make that allow us to gain more knowledge and wisdom as we move forward in life which only comes by way of change (evolving).
  2. This might be exampled by having an experience related to being treated unfairly, unkindly, with disdain and hatred but not allowing that to change your commitment to treat others as you would like to be treated (remaining the same).