Ich lebe, mein Herze, zu deinem Ergötzen, 145, is a five-movement church cantata on a libretto by Picander which Johann Sebastian Bach, as its composer, probably first performed in Leipzig on Easter Tuesday, 19 April 1729. As a seven-movement pasticcio, with one of the added movements composed by Georg Philipp Telemann, it is an Easter cantata known as So du mit deinem Munde bekennest Jesum or as Auf, mein Herz!. Ich lebe, mein Herze, zu deinem Ergötzen is one of less than a dozen extant cantatas and fragments of what is known as Bach's Picander cycle, or his fourth cantata cycle. According to the first publication of the cycle's librettos, this cycle ran from 24 June 1728 to the fourth Sunday after Trinity, 10 July 1729.
Picander's libretto for Easter Tuesday 19 April 1729
The Ich lebe, mein Herze, zu deinem Ergötzen libretto for a cantata for the Third Feast-day of Easter was published in Picander's 1728–29 year-cycle of cantata librettos, which was first issued starting with a cantata for an occasion some three months after Easter. If first performed according to the plan of Picander's original publication of the cycle's librettos, BWV 145 premiered on 19 April 1729. The closing chorale is the fourteenth and final stanza of Nikolaus Herman's Easter hymn "Erschienen ist der herrlich Tag".
Preceding movements a and b
The five movements on Picander's text seem rather short for the purpose, therefore Alfred Dürr suggests that Bach might have added a sinfonia, as in two cantatas of the period, BWV 174 and 188, admitting that there is no source to substantiate it. Instead, in 19th-century manuscripts of the cantata, the five Picander movements are preceded by two movements:
BWV 145/a: a four-part setting of the first stanza of Caspar Neumann's hymn "Auf, mein Herz, des Herren Tag"
BWV 145/b: the first movement from the cantata TWV 1:1350 by Georg Philipp Telemann, "So du mit deinem Munde bekennest Jesum", a paraphrase of.
The two movements may have been added after Bach's death to make the cantata fit to be performed on Easter Sunday. Picander did not refer to the specific readings for the Third Day of Easter in his text. According to Klaus Hofmann, Carl Philipp Emanuel Bach expanded the cantata by the two additional movements in Hamburg and set the first movement himself. In 1787 Carl Philipp Emanuel Bach published the music of that movement as composed by his father. According to Günther Zedler this sufficiently confirms that the movement was composed by the father. According to Christoph Wolff, the cantata may have been compiled by Carl Friedrich Zelter for the Sing-Akademie zu Berlin.
The first added movement is a four-part setting of the chorale stanza. The Telemann movement is in two parts, a duet and a choral fugue, with strings and instruments colla parte and a partly independent trumpet. In Telemann's cantata, it was preceded by an instrumental introduction on the same theme. The first movement on Picander's text is a duet with obbligatoviolin. The tenor expresses the position of Jesus "Ich lebe, mein Herze, zu deinem Ergötzen", whereas the soprano answers as the believer: "Du lebest, mein Jesu, zu meinem Ergötzen". The movement resembles duets of Bach's secular cantatas and is possibly the parody of an unknown work. It is unusual that Bach has the tenor represent the voice of Jesus. The following secco recitative ends as an arioso to stress the words "Mein Herz, das merke dir!", a thought picked up in the following bass aria, the movement with the richest instrumentation, all instruments but the viola. It has the character of a dance in even periods and may also be a parody of a secular work. The cantata is closed by a four-part setting of the last stanza of the Easter hymn "Erschienen ist der herrlich Tag".
