Structure and scoring Bach structured the cantata in six movements, framing alternating
recitatives and
arias by an opening
chorale fantasia and a closing four-part chorale. He scored it for
soprano,
alto,
tenor and
bass soloists, a
four-part choir, and an ensemble of
Baroque instruments:
horn (Co) or (later)
trombone to enforce the hymn tune,
flauto traverso (Ft),
flauto piccolo (Fp) or (later)
violino piccolo, two
oboes (Ob), two
violins (Vl),
viola (Va),
cello (Vc), and
basso continuo. The title page of the autograph score reads: "Concerto. / Dominica 18. post. Trinit: / Herr Christ der einge Gottes Sohn etc. / a / Traversiere / 2 Hautbois / 2 Violini / Viola / Canto / Alto / Tenore / Basso / e / Continuo. / d. J.S. Bach". In the following table of the movements, the scoring follows the
Neue Bach-Ausgabe. The
keys and
time signatures are taken from
Alfred Dürr, using the symbol for common time (4/4). The continuo, playing throughout, is not shown.
Movements 1 As in most cantatas of the second cycle, Bach set the opening chorus on the first stanza of the hymn in its original wording, "" (Lord Christ, only Son of God), as
chorale fantasia. He assigned the
cantus firmus to the alto, enforced by a horn (in later performance replaced by trombone). Bach had used a cantus firmus in the alto already in his chorale cantata , for the second Sunday after Trinity. In , this leaves the sopranos free, as the musicologist Julian Mincham notes, "to dance their own hymn of joy in the upper register above the chorale tune, thus lightening the texture and mood of the entire chorus". An unusual flauto piccolo or
sopranino recorder is used to illustrate the sparkling of the morning star. Hofmann notes that it was Bach's first use of a sopranino in a cantata, and the first introduction of his Leipzig audience to the instrument which had not been used as a concert instrument. In a later performance (probably 1734) it was replaced by a violino piccolo. The choral setting is
polyphonic in the three other voices and embedded in instrumental music based on similar motifs.
2 The first recitative for alto, "" (O wondrous power of love), is secco, only accompanied by the continuo. It refers to Jesus as descendant of
David and son of
Mary, reflecting the Virgin birth.
John Eliot Gardiner, who conducted in 2000 the
Bach Cantata Pilgrimage and performed this cantata in Leipzig's
Thomaskirche, notes that the cantata's two recitatives are "exemplary even by Bach's standards in their economy of means and richness of expression. Mincham notes that a "flowing bass line" is heard when one line is quoted from the hymn, referring to "the end of earthly time".
3 The tenor aria, "" (Ah, draw my soul with skeins of love), is accompanied by the transverse flute, probably played by the flauto piccolo player of the first movement. As for , written some weeks before, Bach seems to have had an excellent flute player at hand, whom he used in twelve cantatas in the fall of 1724. Some musicologists think that he was Friedrich Gottlieb Wild, a law student.
4 The recitative for soprano, "" (Ah, lead me, o God, to the right path), is a prayer for God's guidance.
5 The bass aria illustrates the words "" (Soon to the right, soon to the left my erring steps leaned) in jagged motifs and a frequent switch between winds and strings. In the middle section steady steps picture "" (Yet go with me, my Savior). The final part combines both elements. Gardiner notes that Bach uses the winds and strings in concerting choirs (
cori spezzati), enforced by positioning them on galleries, one of them right, the other left of the singers. The technique had been practised in Venice in the late sixteenth century and introduced in Germany by composers such as
Heinrich Schütz who studied in Venice. Gardiner observes also a hint at the style of French opera which Bach may have heard, traveling as a boy in northern Germany, at the
Hamburg opera, in
Celle or
Lüneburg.
6 The closing chorale,"" (Kill us through your goodness), is a four-part setting for the choir, horn, oboes and strings playing
colla parte with the voices. == Recordings ==