" Grit is based on several things. To increase and refuel the grit inside you, we’ll start by exploring agency, the sense that you can make things happen rather than being helpless. Then I’ll cover different aspects of determination, including patience and a fierce tenacity. We’ll finish with ways to increase your vitality, including through accepting and appreciating your body. "

― Rick Hanson , Resilient: How to Grow an Unshakable Core of Calm, Strength, and Happiness