Has ever occurred to you that what you see when you look "yourself" in the mirror, what you unconsciously consider your "true" physical representation, is not what other people see? And not because they filter the image of you through their own "categories", but simply because they see you and not the mirror image of you, which is familiar to you only. Which is also the reason why when you look yourself in a photograph you have that weird feeling of being looking at the face of a stranger.
I always wondered how my personality would have developed in a world without mirrors and pictures. How would you relate to yourself and the others without a preformed image of yourself? If everything is relation, if there can be more than one image of yourself, with each image being no more real than the others, then who are you? Can you conceive yourself and the world without frames of reference? After all, isn't what we call "identity" just a set of rules that puts us in relation to our surroundings? And if that set or rules is arbitrary, then, isn't the very concept of identity a mere delusion? Then when people tells us "just be yourself", what the hell are they talking about?
I say: stop trying being "yourself", there is no such a thing, embrace your true nature, break the rules,
be no one!