Self-esteem is a term in psychology to reflect a person's overall evaluation or appraisal of his or her own worth. Self-esteem encompasses beliefs (for example, 'I am competent', 'I am worthy') and emotions such as triumph, despair, pride and shame. 'The self-concept is what we think about the self; self-esteem, the positive or negative evaluation of the self, is how we feel about it'.
Contributions by SteveWolfer, Supernaut76, and RK.
That is because self-confident people trust their own abilities