Strong Thesis in My Literary Essay of THE SCARLET LETTER

Okay, so I have to write a literary essay for The Scarlet Letter and how the meaning of Hester Prynne's "A" changes three times. Is this a strong thesis?

Although the scarlet A is only one symbol, the symbolic meaning changes multiple times.

I would include what the three things it changes into are

For example,
Although the scarlet A is only one symbol, the symbolic meaning changes from "humility" to "Able" to "something else"

You get my drift? include the three things into which the A becomes

okay so here's the new one..
Although the scarlet A is only one symbol, the symbolic meaning unexpectedly changes from adulterer to alienation then again to able.

Excellent! This is very good advice. We are lucky to have you here, Kahlil. You have the same name as one of my favorite writers! Can you guess who it is?

Use " " marks for clarity:
Although the scarlet A is only one symbol, the symbolic meaning unexpectedly changes from "adulterer" to "alienation" then again to "able."

This is good, but it can be better. Go deeper in your thinking.
Like this:
Although the scarlet A is only one symbol, the symbolic meaning unexpectedly changes from "adulterer" to "alienation" and then again to "able," and Hawthorne probably chose to do this because _______________...