Willpower is the ability to force yourself to focus on something for hours a day, day in and day out. Willpower is a limited resource that forces the brain to consume a lot of brain fuel (oxygen and glucose). Because the brain cannot store its fuel, this means every time you force the brain to work it must send a signal to various organs and glands to increase production of glucose. The brain would rather not do this. It will fight you when you are engaged in forced focus of any kind. When you want something enough, however, this Want Power overrides the brain’s natural inclination and forces it to secure more glucose. The brain has no choice but to obey the command.
If you want something bad enough, your brain becomes your servant. If your passion for something is not that great, the brain becomes the master and will force you to stop engaging in forced focus. Want Power creates willpower.