The 90/10 Rule

From my thirty-odd years as a musician I have concluded that only ten out of every hundred musicians has the ability to actually be a musician. Being a multi-faceted endeavor, most people may have several of the facets but lack one or two others, and these become weak links in the chain. For example, you may know how to play your instrument but be unable to get along with other musicians in a band situation. Or you may have the desire and dedication but just don't have the chops. Or you have the chops but lack dedication and would rather go to the hockey game, leaving the rest of the band hanging at rehearsal.
The Chain of Musical Success:
Talent+Knowledge+Desire+Dedication+Personality+Perseverance+Luck
The Chain of Musical Success:
Talent+Knowledge+Desire+Dedication+Personality+Perseverance+Luck