Self-esteem is a term in psychology
Psychology is the study of the mind and behavior. Its immediate goal is to understand individuals and groups by both establishing general principles and researching specific cases. For many, the ultimate goal of psychology is to benefit society...

 to reflect a person
A person is a human being, or an entity that has certain capacities or attributes strongly associated with being human , for example in a particular moral or legal context...

'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
Pride is an inwardly directed emotion that carries two common meanings. With a negative connotation, pride refers to an inflated sense of one's personal status or accomplishments, often used synonymously with hubris...

 and shame: some would distinguish how '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'.
A person’s self-concept consists of the beliefs one has about oneself, one’s self perception, or, as Hamlyn (1983: 241) expresses it, “the picture of oneself”.