I'll add, because I believe that we can constantly change our sense of self, it could also be what we want our identity to be.

I would also like to add these words that I read from a PhD in philosophy a few years ago:

"What Epictetus is saying, effectively, is that

1. one part of willpower concerns the ability to do what is disagreeable,

2. another part concerns willing not to do something, and

3. a final part concerns knowing what you truly want in the first place.

These are, in short, your will-to, will-not-to, and want-to powers."

I cited that in my https://medium.com/channspirations/the-serenity-prayer-df758d99c956