Re: The Star Wars 7 Thread (SPOILERS. SERIOUSLY. ALL THE SPOILERS.)
I suppose at some point there had to be that first guy who discovered the Jedi mind trick, Jedi patient zero. He felt the Force flow through him and intuited that "Oh hey, I think I might be able to mind-fuck this dude into doing what I want" as opposed to being taught how to do that. I would think then that it's possible to discover a power on your own if you've got high midichlorian--I mean, if the Force is strong enough in you. My personal interpretation was that we have a prima facie case of that with Rey.