Wayne Dyer said, “How people treat you is their karma; how you react is yours.”
I remember my head nearly exploding the first time I heard this.
His interpretation of karma has freed me and my ego (though I need a good reminding every once in a while).
Ultimately, we don’t have control over others’ actions. We only have control over our own. If others treat me poorly, it has nothing to do with me. Furthermore, if others treat me kindly, it also has nothing to do with me.
All that matters is how I choose to act and react.