"Alice Munro, while teaching writing at York University in the 1970s, describes the time a student who wasn’t in her class brought her a story to read. “I remember tears came into my eyes because it was so good…she asked, How can I get into your class? And I said, Don’t! Don’t come near my class, just keep bringing me your work. And she has become a writer. The only one who did.”
Other famous writers echo this sentiment, while addressing a variety of topics. It's a great read.