Fantastic! There are striking affinities between the aria “Herr, du siehst statt guter Werke” taken from Bach’s Cantata BWV 9, beginning with the last few notes of Schumann’s slow movement, then developed segue in its finale from an initial three-note cell (descending 5th, ascending major 6th)-then Schumann quotes Bach’s line “wir glauben nimmst du an” almost verbatim, but with doubled notes, in a rising sequence. So many references in this music!