A) Being "confident" is nothing more than a belief in yourself. It’s the feeling of certainty that you can accomplish whatever you set your mind to. Confidence comes from within, and you can find ways to be more confident at any timee.
B) That’s not to say learning how to be confident will solve all your problems. Everyone has bad days or moments that upset them. Being confident also doesn’t mean you’re completely sure of yourself at all times. Creating confidence is not about knowing it all; it’s about trusting, trusting yourself that no matter what happens in a particular situation, you’ll be able to handle it and learn from the outcome.
And I'm confident cuz I believe I can do what ever passed through my mind, just believing in my capabilities, believing in me. when you'll started believing in you, at that time you'll accomplished the imposible... Just believe in you.