Healthy Self Confidence – What is it?

Is it feeling superior to others?
Is it being stubborn and single minded?
Is it about being oblivious to other people?
Is it about be self-centred?
Well, it may be useful to start off with a dictionary type definition. The Oxford Reference Dictionary says that confidence is..
“firm trust, a feeling of certainty, sense of self-reliance, boldness”.
Regarding the expression ’self-confident’ [...]