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What an interesting life this man had, and what insight he had, too.

For example, a quote from the above referenced article:

"While I may not have learned much about music from John, I learned a lot about BEING a musician, things like: showing up on time, having everything I needed to do the gig, making the best of bad playing conditions, and soldiering on even when some of the other players around me were not as good as they should have been."

(Truer words have never been spoken; 95% of the skills needed to be a successful free-lancer are stated in the quote above)

That article is well-worth the time it takes to read it. What a tremendous ode to a great mentor!
Fortunately for all of us, there are still guys like this in the business, and other guys who have the skill to write about them.