The third volume of the Bach Cantatas series is concerned with the cantatas for Trinity XVII to XXVII, which include those for Michaelmas and Reformation Day. The topics that this third section of the Trinity cantatas principally consider include the following (1) the humility of purpose, (2) love divine and mortal, (3) good and evil, (4) the journey of renewal, (5) blind attractions, (6) unbelief and belief, (7) threat and mercy, (8) falsity and friendship, (9) fear and hope, and, (10) the Last Judgment.

These 34 cantatas constitute the final section of all the Trinity Sundays and associated feast days, which span October and November in the Lutheran liturgical year. The didactic liturgy then yields to the liturgy of life of Christ, which begins with Advent and concludes at Trinity Sunday.