The 2nd 10,000 Hours
We’re all familiar with the 10,000-hour principle, the idea that it takes around that much time to become an expert in a given field. I remember asking my piano teacher a similar question when I was young: “How long does it take to become a professional musician?” Without hesitation, he calmly and confidently replied, “12 years.” I was a bit taken aback, mostly by his certainty. How could he know for sure?
