Why is it so important to understand this concept? If you just want to chase the fame then I guess writing is certainly not the profession for you. Writing is all about expressing yourself towards an expression which you never reach. It’s about tiny details which you can never see but only imagine. It’s about starring at paper for such long time thinking till the moment when blood starts trickling from your forehead. And it’s not easy until you love it. Most people can write but only few who write for themselves and value their writings like million bucks can only be called writers. There is nothing more common than piece of paper with some crap written on it. If you are the one who can find value in that crap then you are a writer. From the farther beginnings, all the great writers were great thinkers and even before that they were great readers. Make sure first you learn the value of writings much before developing vocabulary or correcting grammar. Read your writing or someone else writings as if nothing on earth is more precious than that. Once you understand the value of it only then you can ever be worthy of it.