What exactly do you mean by faking wisdom and self-security? That seems rather like building a house on sand--it's going to collapse eventually.
I think true self-confidence can only arise out of self-knowing. And that requires a deep insight into your Self. "Who are you?". If you can answer this question then wisdom and self-knowing come about naturally.
oh perhaps I didn't make my self clear enough @tobetada I didn't mean faking wisdom :) Just faking you are calm even if you aren't:) Perhaps eventually you'll be able to stay more and more calm just by practising.