CONFIDENCE is generally described as the belief in the powers, trustworthiness or reliability of a person.
CONFIDENCE is a state of being certain either that a hypothesis or chosen course of action is the best or most effective.
SELF CONFIDENCE is the belief in oneself and one's powers and/or abilities.
Being SELF CONFIDENT in one skill does not necessarily mean being SELF CONFIDENT in other skills.
'If you have no Confidence in self you are twice defeated. With Confidence you win before you have even started.'
Marcus Tullius Cicero, Roman Lawyer and Scholar
'The way to develop self confidence is to do the thing you fear and get a record of successful experiences behind you.'
American Lawyer, Politician and Orator