There is self-confidence, and then there is self-confidence.

CNN: Commentary: Heroes in lab coats

There is no shortage of self-confidence in this young man.

CNN: Commentary: Obama a one-term president?

There is nothing wrong with self-confidence - when it is coupled with restraint, modesty and willingness to accept guidance from those with more experience even if you don't feel you need it.

BBC: Young people and self-esteem: Your views

An independent evaluation of Big Noise Raploch which was commissioned by the Scottish government reported last year that there is strong evidence that the project boosts children's personal and social development, confidence, self esteem, social skills, and the ability to concentrate.

BBC: Glasgow backs Govanhill Big Noise project

There are plenty of things that matter more than competence, such as the ability to project drive and self-confidence.

ECONOMIST: Why some people have power over companies and others don��t