The Self and Its Emotions

If there is one value that seems beyond reproach in modernity, it is that of the self and the terms that cluster around it, such as self-esteem, self-confidence, and self-respect. It is not clear, however, that all those who invoke the self really know what they are talking about, or that they are all talking about the same thing. What is this thing called 'self', then, and what is its psychological, philosophical, and educational salience?