Opportunity creates confidence or vice versa ?

I was contemplating whether an opportunity creates confidence, confidence creates the opportunity or both ?

Perhaps the answer is dependent on the situation or context.

Lets take for example, Kobe Bryant taking a buzzer beating basketball shot. We all now what a great player Kobe is and has been throughout his career. What we don't know is whether his confidence at the time provided him the opportunity to take the buzzer beating shots. Perhaps his coaches and team had the confidence in him to give him the opportunity to take that kind of shot.

It's also possible that it was the mix of both possibilities. Confidence isn't something that is developed after being successful at something after just one instance, or is it ? I'll save that question for another blog entry. Lets then assume for the sake of argument that confidence is built over a period of time.