Opportunity requires interacting with the world around us; And interacting with the world around us requires confidence.
With confidence, it's as if we have skills such as:
(1) talking to strangers,
(2) asking questions in the weekly team meeting, or
(3) speak out when new ideas pop up.
These skills open doors of opportunities for us. We gained a chance to:
(1) befriend with someone who becoming your business partner in the future,
(2) get a better performance review which leads to a promotion and a raise, or
(3) get a lifelong sex partner. (If you wish to. But please don't if you are in a relationship.)
Confidence is something we need to build up overtime; it requires practice; It's a skill that we have to learn.