The "Erwäge" aria of Bach's St John Passion is harmonically extremely similar to the final Chorus of Bach's St Matthew Passion (to the extent that when listening to the former, I keep waiting for the chorus to break out in the latter). Is there any discussion somewhere of why Bach may have did this? Thematically they occur at different points of the passion. Possibly the answer is as simple as "he liked how it sounded" but perhaps there is a different answer.

  • I do think we in modern & post-modern musicians are apt to overthink the compositional processes of our forebears. Which is to say that your prosaic hunch is probably correct. That said, JS Bach was JS Bach: anything is possible. – Dean Ransevycz Jan 8 at 8:46

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