The Casual Vacancy question

J.K Rowling, I've been waiting for an opportunity like this to confirm an answer to this question that constantly ponders in my mind.
I find your writing quite suttle, and as the incredible author you are, im sure you can tell me, how do you create the suttleness and humbleness that is required to be capable of defining such significant characters that are in no way similar to yourself?
P.s my name is K.J Dowling.