Let's perform a "thought experiment". Shall we?
Imagine walking in to a series of Jazz nightclubs in the 1950's and hearing various soloists and trios performing their variations on the same tune.
If a famous orchestra, trio or band becomes popular other groups try to emulate them. Musicians at the top try to best one another in a "battle of the bands."
A pianist like Thelonius Monk created awkwardly wonderful chords, accents and improvisations hunched over the keyboard so that other pianists and copyists could not tell what he was doing with his hands. Charlie Parker could string together incredibly intricate improvisations with rapid notes, accents, transpositions and eloquent variations.
Jazz players like to substitute chords and change harmonic structures to create interest. Arrangements often change the temp and alter eighth notes into dotted notes for syncopation.
Many players can work in other snippets of familiar tunes when the mood strikes them. Mix and match, cut and paste, outright invention on top of existing bass notes....the number of ways to change things is vanishingly huge!
The result (the performance) is live and "on the fly". Inspiration is never twice the same.
HERE COMES THE THOUGHT EXPERIMENT.
What if, instead of Johnny Green's BODY AND SOUL, there was a tune written 300 years in the past found on parchment by a musicologist who showed it to a jazz pianist who played it and it was heard by a sax soloist who played it who was heard by an arranger who wrote it up for his band to play?? The tune gets passed around, changed here and there, reimagined in each performance....
QUESTION:
What relationship exists (if any) between the 1748 composition on parchment (in the mind of the composer) and the various "versions" performed in jazz nightclubs in the 1950's?
What if the original parchment is lost or destroyed? How close would the RECONSTRUCTION be to the original after so many reimaginings and extrapolations?
Could any of the NEWER versions be said to be "more accurate" than the earlier ones? Would the most popular be any better (in terms of accuracy) than the less popular?
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I assert that something like our thought experiment is what is going on with Scripture!
Each hand and mind that touches what went before CREATES something anew. The alteration is personal and "meaning" is always in the current idiom and style filtered through a singular mind at work in spontaneity.