Gelobet seist du, Jesu Christ, BWV 91
History and words. The chorale cantata from Bach's second annual cycle is based on the main chorale for Christmas Day, "" (1524) by Martin Luther. The beginning summarizes Christmas in two lines: "" (Praise be to You, Jesus Christ, since You were born a man). All stanzas end with the acclamation . The cantata was Bach's first composed for Christmas Day in Leipzig; in his first year in Leipzig 1723 he had chosen to perform again , written before in Weimar. The prescribed readings for the feast day were from the Epistle to Titus, "God 's mercy appeared" () or from Isaiah, "Unto us a child is born" (), and from the Gospel of Luke, the Nativity, Annunciation to the shepherds and the angels' song (). The unknown poet of the cantata text kept the first and the last stanza, expanded verse 2 by recitatives, transformed stanzas 3 and 4 to movement 3, an aria, stanza 5 to a recitative, and stanza 6 again to an aria. Bach performed the cantata again four more times on 25 December, in 1731, in 1732 or 1733, and twice in the 1740s, even after his "Christmas Oratorio" had been first performed  in 1734, which also uses two stanzas of Luther's chorale. Scoring and structure. The cantata in six movements is festively scored for soprano, alto, tenor, and bass, a four-part choir, two horns, timpani, three oboes, two violins, viola and basso continuo. He would later use the pair of horns in Part IV of his "Christmas Oratorio". Music. The opening chorus makes use of four choirs: the voices, the horns, the oboes and the strings. The material from the ritornellos is present also in interludes between the five lines and as accompaniment for the vocal parts. The choral melody  is sung by the soprano. The lower voices are set in imitation for the first and the last line, in chords for the second and fourth line, and in a combination in the central line "" (from a virgin, this is true). In movement 2, the recitative is contrasted with chorale phrases, which are accompanied by a repetition of the first line of the chorale in double tempo. The tenor aria is accompanied by three oboes, whereas the strings illuminate the following recitative. The last aria is a duet, contrasting "" (poverty) and "" (abundance), "" (human being), rendered in chromatic upward lines, and   (angelic splendours), shown in coloraturas and triadic melodies. At times the horns have independent parts in the closing chorale and embellish especially the final .