First and foremost, to be a natural, one must exert a modicum of practice to become proficient.
There are, however, some people who may be more adept to achieving proficiency because of their background and may require less practice than others.
They say a human being's personality and character traits are formed in the first 2 years of life.
Take typing, as an example. I don't know why I can bang out 150-plus words per minute on a QWERTY keyboard effortlessly for many years, while others struggle to reach a speed above 80 words per minute.
With pool, if a young boy envisions pool as his survival, meaning where he will get his next meal, he might be inclined to apply himself to playing pool more seriously than the young boy who lives in an affluent environment and does not have any monetary worries.
There are some pool players who could see heights beyond our gaze from the very first time they picked up a cuestick. Their trek to the top becomes their sole passion in life, their first priority. Because of this, they will put pool above getting an education, starting a family, purchasing a cool sports car, and developing a traditional career in the business world.
I do believe there are so-called "naturals" in any endeavor, but the passion must be there to achieve greatness.
I'm currently working on a project about a college sports coach who is having trouble getting his team to perform. It is all about the power of positive thinking. Once you understand the mechanical skills of the game, to include pool, the rest of it is in the mind. There is something to be said about the power of positive thinking in the sports world -- heck, in any success, one doesn't achieve it unless they have strong self-confidence and positive thinking. It's no different in pool.