The first thing I thought of when I read this was the saying “with great power comes great responsibility” because if one's greatest strength if not maintained and used in a positive way could turn out to be his greatest weakness.
So often it is seen that when people have a certain amount of power they don’t always use it in the most positive way.
My greatest strength is that I am very kind, yet it is also my greatest weakness. Now you might be thinking how on earth can someone be too kind, but the truth is it has got me into trouble plenty of times, I have no poker face so if someone asks me for something i give them or want my help i give them.
Another of my greatest strengths and weaknesses is my ability to continuously speak my mind. I am often told I call a spade a shovel and that I have no tact. Even though I know being honest is the best way, I need to know when to bite my tongue and when not to because what I say can often be hurtful and mean without me even realising.