Confidence is not just in people's heads; it comes from the culture of the organization. It's easier to expect success when working in an organization that has a culture of accountability, collaboration, and initiative. Without this, it's easier - and more self-protective - to assume failure so the person is not disappointed and instead pleasantly surprised.
Rosabeth Moss KanterThe positive outlook that optimists project does not come from ignoring or denying problems. Optimists simply assume that problems are temporary and can be solved, so optimists naturally want more information about problems because then they can get to work and do something. Pessimists are more likely to believe that there is nothing they can do anyway, so what's the point of even thinking about it?
Rosabeth Moss KanterInnovation is an outgrowth of initiative, and initiative - taking positive actions in a belief that your actions can make a difference - is a big part of confidence.
Rosabeth Moss KanterPessimists see problems as stemming from stable and universal causes, thus making them less susceptible to corrective action. Optimists, in contrast, view problems as temporary and resulting from specific factors that will either change or be changed.
Rosabeth Moss Kanter