I watched an interview with J.K. Rowling, and the interviewer found it hard to believe that she didn't know Harry Potter would be such a huge success.
The interviewer kept on asking how Rowling envisioned what it would be like to get famous, but she kept denying any visions of grandeur. "You are wasting your time," she said at last when asked for advice to writers who are sure they're destined for the top, "Just get on and work."
When we start writing, it's easy to imagine our stories becoming bestsellers, adapted into blockbuster movies, and gaining widespread acclaim. But fantasies don't finish drafts. The path to becoming a successful writer is paved with hard work, determination, and the willingness to face the challenges head-on.