While I was slowly and carefully playing through the last of Bach's English Suites until a few minutes ago, I kept thinking about how many rules of counterpoint Bach breaks, and how often he breaks them. Then it occurred to me that Fux (1660-1741), the guy who wrote the rules of counterpoint as we know them, may have predated Bach by a generation, but he didn't write his Gradus Ad Parnassum until 1725, and by the time Bach could have even gotten his hands on a copy he could no longer see.
I have nothing against Fux. I cut several sets of teeth on Gradus Ad Parnassum. I just had a sudden realization about Bach today, and appreciate his deviations from what is to be expected even more than I did yesterday.