For Reformation Day 1725, Bach wrote a festive cantata for a large ensemble. ... the first three movements of the cantata can be said to form a unit. Their theme is to praise God and thank Him for His benevolence. What is lacking is the specific occasion. This is what Bach now turns to in No. 4, recitative: "Du hast uns durch dein Wort gewiesen" ("You have instructed us through your word"), that is, Jesus is the sole intermediary, thereby addressing the basic issues of the Reformation. Bach underscores this word, "Mittler" ("mediator"), with the motif of the cross, as if to imply that the cross is necessary for any intercession between God and mankind.
In No. 5 The command to love God restores balance to the setting and exhorts the congregation to do the same.
... [In] No. 6, the final chorale, the words mention two additional key ideas of the Reformation, "Wahrheit" ("truth") and "Freiheit" ("freedom"), in a majestic chordal setting in unison with the instruments.
- Helmut Rilling
| O be joyful in the Lord
Serve the Lord with gladness
O go your way into his gates
Glory be to the Father
As it was in the beginning