In the mid-1990s, Warren Buffett, one of the most successful investors, shared a story that has since become legendary in business. It involves his pilot, Mike Flint. Flint
Eustress and the “Sweet Spot” of Challenge
2,000 feet above the Yosemite Valley floor, clings to the side of El Capitan, his fingertips and toes finding grip on the tiniest of ledges. The sheer granite