Self-concept or self identity refers to the global understanding a sentient being has of him or herself. It presupposes but can be distinguished from self-consciousness, which is simply an awareness of one's self. It is also more general than self-esteem, which is the purely evaluative element of the self-concept.[1]
The self-concept is normally viewed as being composed of relatively permanent self-assessments, such as personality attributes, knowledge of one's skills and abilities, one's occupation and hobbies, and awareness of one's physical attributes.
For example, the statement, "I am lazy" is a self-assessment that contributes to the self-concept. In contrast, the statement "I am tired" would not normally be considered part of someone's self-concept, since being tired is a temporary state. Nevertheless, a person's self-concept may change with time, possibly going through turbulent periods of identity crisis and reassessment.
^ Fleming, J. S., & Courtney, B. E. (1984). The dimensionality of self-esteem: II Hierarchical facet model for revised measurement scales. Journal of Personality and Social Psychology, 46,404-421.