What I mean by this is that i believe there are certain things not all humans can do. Mainly physical things, like if you arent a great singer naturally, good chance you wont make money off of it, or if you arent super tall or athletic you will not be able to become a professional athlete. Is math similar in fashion where you need a certain way of thinking/disposition, or is it purely effort based where even a retard would be able to grasp the concept of higher level mathematics with enough effort, regardless of how smart he is? Does effort go that far or do you need something else entirely???