How people experience themselves affects every moment of their existence. Their self-evaluation is the basic context in which they act and react, choose their values, set their goals, meet the challenges of life. Their responses to events are shaped in part by who and what they think they are-how competent and worthy they perceive themselves to be. Of all the judgments they pass in life, none is more important than the judgment they pass on themselves. To say that self-esteem is a basic human need is to say that it makes an essential contribution to the life process, that it is indispensable to normal and healthy development, that it has value for survival. Without positive self-esteem, psychological growth is stunted. Positive self-esteem operates, in effect, as the immune system of consciousness, providing resistance, strength, and a capacity for regeneration.” (Nathaniel Branden)