Please explain the quote, ';I wore a mask and my face grew to fit it'; from Orwell's Shooting an Elephant?

I don't quite understand it, please explain completely.Please explain the quote, ';I wore a mask and my face grew to fit it'; from Orwell's Shooting an Elephant?
i think the person had put on this false image for people to see for so long that they forgot the person they once were. I think the person is afraid of what people think, therefore insecure and she thought by trying to be someone else it would heal them but it only made it forget the person she was before it. Please explain the quote, ';I wore a mask and my face grew to fit it'; from Orwell's Shooting an Elephant?
Whoever is speaking this, was putting on a ';mask';, acting like somebody that he wasn't. Eventually, after wearing this ';mask';, he actually BECAME the person that he was pretending to be in the first place.
I haven't read the book you are referring to, but I imagine this means:





If you try hard enough to act a certain way, or pretend to be something, that eventually, you may end up becoming what you envisioned or what you pretended to be.






It means he pretended to be something he was not, but became that which he pretended to be.





In other words he lost his own identity and became something he is not.