We can only ever be who we are.
It means that who we are should be what we choose, not what someone else chooses for us, not what someone says we should be. We decide. We have to look in the mirror and be satisfied. Just us.
But that doesn't mean that we are limited to being a person we're not happy with or a person who makes others unhappy. It doesn't mean we're incapable of change or unable to break the chains that keep us from ascending and evolving.
It just means we choose.
We decide.