You can't re-write a blank page

I follow a number of musicians on YouTube, many of whom I've discovered via their collaboration with Frog Leap Studios. One of them is Mary Spender, but she does a lot more videos than just music, which I typically ignore. For some reason, I decided to click on one this AM before work, and she was talking the typical "Just start" type of pep-talk to those who might want to make a change or start a project but can't seem to, and, because I've had an idea for a novel stuck in my head for decades now, the line in the title of this post really resonates with me. Most writing is re-writing, and "you can't re-write a blank page."