Key to willpower lies in believing you have it in abundance. People who believe they have an abundant supply of self-control are more likely to feel invigorated by mentally taxing activities than people who believe their willpower is a finite resource

See the source article by following the link below:
Key to willpower lies in believing you have it in abundance. People who believe they have an abundant supply of self-control are more likely to feel invigorated by mentally taxing activities than people who believe their willpower is a finite resource