To be nobody but yourself in a world which is doing its best, night and day, to make you everybody else means to fight the hardest battle which any human being can fight; and never stop fighting. ~e.e. cummings, 1955
We often think we have to change who we are to get what we want -friends, lovers, jobs. We so crave acceptance that we are willing to be false to our true selves. Adapting to your environment is often wise. Flexibility is necessary to be strong but, deep down inside - don't ever stop being your authentic self. That is where true strength lies.
Affirmation - say: I will strive to be my authentic self, even when I need to be adaptable and it will make me stronger.