" What's fascinating about this list is that ten people with a a slew of medals among them decided that the two most important determinants of mental toughness - believing you can achieve a goal and having the ability to pick yourself up after you fail - have nothing whatsoever to do with performance and everything to do with persevering through doubt, disappointment, and other forms of discomfort. "

― Amanda Lang , The Beauty of Discomfort: How What We Avoid Is What We Need