As I get older, I find the idea gets more and more disconcerting. I used to believe in this so much, especially in my early 20s, that I had become utterly attached to the idea of "myself". Not quite a healthy way to live I find.
I remember Kenneth Branaugh saying in an interview that he gets a bit uncomfortable with actors talking about their acting approach because in his experience, one's a approach changes. Viola Davis (2012 Oscar Best Actress in my book), also in an interview, concurred. Not to push the metaphor too much but we all kind of try to fit into some character at different points in our lives --- a character that we think best suits us at a particular point in time. And how we try to fit ourselves in that character, changes through time.
Many a person has said "I like who I am". But, really, how can you really say that? Also, what of our flaws? I know it is healthy to be accepting of them BUT shouldn't we at least try to change for the better? Aspire to be someone superior to our "current" selves, even if only slightly? Shouldn't we raise the bar for ourselves?
Perhaps I would rather say, "I just do what I can and try to be the best person I can be."
I suppose you can start getting to know your inner core, your inner nature, and work from there. Your inner nature is sort of the soil on which you plant different kinds of flowers, trees... They change through the seasons but still somehow remain the same. Not Oscar Wilde but you know what I mean.
Life is a process of becoming, a combination of states we have to go through. Where people fail is that they wish to elect a state and remain in it. This is a kind of death. ~Anaïs Nin