sure of oneself

sure of (oneself)

Very self-confident. You can't go into that interview wondering if you're good enough for the job—if you're sure of yourself, the interviewer will be sure of you, too. A: "Well, Tammy's very sure of himself, isn't she?" B: "Yeah, we've never needed to worry about her succeeding in life."
See also: of, sure

sure of oneself

Self-confident, as in Now that Mary's graduated she's much more sure of herself. This expression uses sure in the sense of "confident" or "secure," a usage dating from the mid-1400s.
See also: of, sure
References in periodicals archive ?
Being a warrior means being sure of oneself, having no uncertainty about one's own abilities or successfulness.
One always has something to learn in life and being too sure of oneself is a symptom of ignorance.