I'm sure you've heard about a sculpture chipping away on a stone to release what's already there and not to create something new.
So, I think that we were all born with the abilities, but that our growing up and society and peers shape us in such a way that we may not have nurtured certain abilities and thus they have atrophied.
But then there are sometimes life-changing situations, that push us into a corner and we are forced to flex those abilities, like a muscle, in order to survive. Our survival instinct is so strong, that it will push aside a lot of our learned behaviors and characteristics and allow us to dig deep and find things inside of us, that we never knew we had. And, then, if we continue to 'work that muscle' we can do more and more of this 'new' activity or whatever you want to call it.
How often have we heard of someone having had a 'disaster' happen to them and 2 years later, they say that it was the best thing that could have happened? The person who lost their job and who started their own business. The single mother, who lost her husband to some tragedy and now has to struggle to bring up 2 children and who becomes more than she would have been with her husband.
So, I think we have it in us, but that it's up to us whether we are willing and able to let down the walls, that keep us from utilizing more of ourselves. Many people are simply finding comfort in those walls and others may need a push and still others hear about something and tear those walls down, running full force the whole way......