I GREW UP WITH a friend who came from neither privilege nor natural intellect, but was the hardest-working guy I knew. These people have a lot to teach because they have an unfiltered understanding of every inch of the road to success. His life’s mission and dream as a teenager was to be a doctor. To say the odds were stacked against him is being charitable. No reasonable person at the time would consider it a possibility. But he pushed. And—a decade older than his classmates—he eventually became a doctor. How much fulfillment comes from starting from nothing, bulldozing your way to the top of
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