- David Quammen
Pound The Stone: 7 Lessons To Develop Grit On The Path To Mastery
"There's a secret to mastery that you may have never heard, a single little thing that only the very best in the world know how to do. In fact, I believe it is the only thing anyone can do to gain true mastery at anything, and it's an equal opportunity principle. It can be applied to fulfill your po
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