There’s a quote about The Grateful Dead attributed to legendary rock promoter Bill Graham – “They’re not the best at what they do, they’re the only ones that do what they do.”
In retrospect, I realize that we grow up with a lot of emphasis on becoming the best at what we do. There’s not enough emphasis on becoming the “only.”
And, typically, the route to that is to become very good at (and, hopefully, enjoy practicing) three or four skills that combine and complement each other.