Education is not the learning of facts, but the training of the mind to think. - Albert Einstein

Everybody is a genius, but if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid. - Albert Einstein

That being said, I believe everyone has the ability to learn, and they will if they have the desire to. It is the responsibility of those with knowledge not to judge a lack there of, but to fill the void as much as they can with all they know. That way they may understand that there is more to learn the teacher does not know, and be inspired to seek answers, for that is how knowledge grows. Knowledge after all is the one tool that cannot be taken away.