The idea is that language has a natural melody and meter to it. We may not realize it right away, but the way we speak affects our communication as much as the words we speak.
Songwriter’s block is an excuse us songwriters use when we can’t find “inspiration”. Staring at a blank page is intimidating. If it stays blank, it can be downright demoralizing. You may think the problem is that you can’t think of what to write. This isn’t quite true though.