I have been taught all my life that anyone can change and improve if they want to. We are not locked into what we are, unless that is what we want !
Other people can try to change us, but that never seems to work out. An old proverb that my grandmother taught me is, A person changed against his will, is of the same opinion still!
The only change that is real, is radical change. Meaning from the base up to the top. Attitude shifting is a real thing. That change comes from a deep rethink. If your change comes from a tragic event or from a joyous moment, it is more than likely, real and will last.
That change can come from a relationship with the creator. He did makes us and give us the ability to improve ourselves. As for me change is usually forced on me, because of behavior and wanting to stay 35 years old my whole life.