The second chapter focuses on the two major functions of self-esteem, especially as they occur in relation to positive psychology, self-control or regulation, and positive emotions. One important function is self-protection, which concerns maintaining a sense of self and identity. In this sense, self-esteem is seen as buffering us from stress in everyday life, helping us deal with disappointment, and bouncing back from failure. The other major self-esteem function concerns enhancement or the expansion of the self and its abilities. In this case, it is shown how healthy self-esteem plays a pivotal role in helping us move beyond our comfort zone, take risks to reach past current limits, see new possibilities, and explore different personal, career, and interpersonal dimensions of life. This material also includes examining the three major theories of self-esteem and the nature of positive emotions.