one·self 
(wŭn-sĕlf) also one's self (wŭn sĕlf, wŭnz sĕlf)
(wŭn-sĕlf) also one's self (wŭn sĕlf, wŭnz sĕlf)pron.
1. One's own self:
a. Used reflexively as the direct or indirect object of a verb or the object of a preposition: One can congratulate oneself on one's victories.
b. Used in an absolute construction: When in charge oneself, one may rearrange the committees as one pleases.
2. One's normal or healthy condition or state.