Summary
This quote suggests that excessive worrying serves no purpose as it involves constantly thinking about circumstances or events that are beyond our control. Worrying is described as a "useless mulling over" because it does not lead to any productive or positive outcome. Instead, it drains our energy and mental well-being. The quote emphasizes the futility of worrying and encourages us to focus our attention on what we can change, accept the things we cannot, and redirect our energy towards more constructive actions.