Please consider this Sarabande as having phrases of 4 measures each. It can be understood as progressing in 4-measure units. Along the way, it modulates to G minor and F minor.

Measures 1-4 and 5-8 are in B-flat major, so they should proceed gently.

Measures 9-12 conclude on the dominant of G minor at measure 12. As this is a point of increasing tension, please apply a crescendo from measure 9. In measures 13-16, the soprano line reaches B-flat, the highest note in this Sarabande, and concludes with a cadence in F minor. Therefore, this section requires the highest tension within the piece.

Following this, measures 17-20 and 21-24 return to B-flat major, so they should again proceed with gentle dynamics. Although a relatively high note, A-flat, appears in measure 21, please proceed gently and softly without increasing tension.