Possibly linked to luck, but I would add another important element: inate ability. No amount of practice - 10,000 hours, 20,000 hours, or every waking moment f

Possibly linked to luck, but I would add another important element: inate ability. No amount of practice - 10,000 hours, 20,000 hours, or every waking moment for the rest of my life, is going to give me Michael Phelps' shoulder size or ability to process lactic acid.