upvoted and resteemed. Maybe the saying is referring to worrying about problems that you can't solve. This is something that happens to those with mental health issues, such as depression, PTSD, and anxiety. The individual regularly worries about a subject or event that they have no control over. As soon as they are able to tell themselves that they don't have to worry over not having control, it is very freeing. Getting ot that point is the hard part.

Thanks for the post!