If you’ve written for at least a little while, you know what Stephen King is talking about.
You can look back at your first few writing attempts and then look at what you wrote most recently. I bet you’ll notice an improvement in your writing.
Measuring the improvement of a skill like writing is challenging to do from day to day. It’s much easier to notice improvement from month-to-month or book-to-book.
Think: What practice or resource have you found the most helpful in “strengthening and sharpening” your writing talents?
It’s down to that age old phenomenon. The more we practice the better we get.