Plasticity
It's possible that you're the way you are, that you do what you do, that you react as you react, and that it can never be changed.
Believing this is incredibly sad, though.
Each of us is capable of just a little more. A little more patience, a little more insight, a little more generosity.
And if you can do a little more, then, of course, you can repeat those changes until you've done a lot more.