Here’s a quote from author Michael Lewis (Moneyball, The Big Short) on the stories we tell ourselves:
“As I’ve gotten older—I would say starting in my mid-to-late 20s—I could not help but notice the effect on people of the stories they told about themselves. If you listen to people, if you just sit and listen, you’ll find that there are patterns in the way they talk about themselves.
There’s the kind of person who is always the victim in any story that they tell. Always on the receiving end of some injustice. There’s the person who’s always kind of the hero of every story they tell. There’s the smart person; they delivered the clever put down there.
There are lots of versions of this, and you’ve got to be very careful about how you tell these stories because it starts to become you. You are—in the way you craft your narrative—kind of crafting your character. And so I did at some point decide, “I am going to adopt self-consciously as my narrative, that I’m the happiest person anybody knows.” And it is amazing how happy-inducing it is.”