Oneself

(pron.) A reflexive form of the indefinite pronoun one. Commonly written as two words, one's self.

Thesaurus Entries

I, I myself, alter, alter ego, alterum, better self, ego, ethical self, he, her, herself, him, himself, inner man, inner self, it, me, my humble self, myself, number one, other self, ourselves, self, she, subconscious self, subliminal self, superego, them, themselves, they, you, yours truly, yourself, yourselves