" Rest” doesn’t just mean sleep—though of course sleep is essential. Rest also includes switching from one type of activity to another. Mental energy, like stress, has a cycle it runs through, an oscillation from task focus to processing and back to task focus. The idea that you can use “grit” or “self-control” to stay focused and productive every minute of every day is not merely incorrect, it is gaslighting, and it is potentially damaging your brain. "

― Emily Nagoski , Burnout: The Secret to Unlocking the Stress Cycle