Charisma, the projection of an aura of self confidence, is based on a simple trick. After a short while there is no difference at all between the pretence and the actuality of self confidence. Anyone wishing to remedy a lack of confidence and charisma, and uncertain as to how to begin pretending to these qualities, may find that a day or two spent pretending to absolute zero self confidence will quickly reveal both the effectiveness of pretence and the specific thoughts, words, gestures and postures required to project either pretence.

Pete Carroll, Rituals and Spell Objectives and Design in Eight Magics