"It is only to the finest natures that age gives an added beauty and distinction; for the most persistent self has then worked its way to the surface, having modified the expression, and to some extent, the features, to its own likeness."

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I have to admit that more and more lately, the whole idea of jazz as an idiom is one that I've completely rejected. I just don't see it as an idiomatic thing any more...To me, if jazz is anything, it's a process, and maybe a verb, but it's not a thing. It's a form that demands that you bring to it things athat are valuable to you, that are personal to you. That, for me, is a pretty serious distinction that doesn't have anything to do with blues, or swing, or any of these other things that tend to be listed as essentials in order for music to be jazz with a capital J.

— Pat Metheny