How you feel about yourself and other people depends on one thing.
That thing also defines and decides your relations with all the people you ever come to contact with and everything you ever do in your life.
Even your career and happiness depend on it.
What is it then that could be so important and pivotal?
Well, it's something you've always possessed.
It's your personality.
But there's one thing that's even more important.
And that is the fact and realization that your personality could modified and changed.