So what is confidence really? It seems that really confident people start out by sort of 'faking it.' Confident people act like they really know what they are doing before they really do. Then they(and others), start to believe in what they are selling and the entire thing just grows as they truly do gain confidence. So what may have started out as sort of an act, becomes more and more real as the person really gets practiced at their chosen field. Before you know it the 'act' is real!