mainly the core group of the , formed by seven singers, three leaders and five other instrumentalists. Additional players of the military band were available when needed, and also town musicians and singers of the gymnasium. Bach as the concertmaster probably led the performances as the first violinist, while the organ part was played by Bach's students such as Johann Martin Schubart and Johann Caspar Vogler. Even in settings like chamber music, Bach requested a strong continuo section with cello, bassoon and violone in addition to the keyboard instrument. Monthly cantatas from 1714 to 1715 While Bach had composed vocal music only for special occasions until his promotion, the regular chance to compose and perform a new work resulted in a program into which Bach "threw himself wholeheartedly", as Christoph Wolff notes. In his first cantata of the series, , for the double feast of Palm Sunday and Annunciation, he showed his skill in an elaborate work in eight movements, for four vocal parts and at times ten-part instrumental writing, and presenting himself as a violin soloist. The following table of works performed by Bach as concertmaster between 1714 and the end of 1715 is based on tables by Wolff and Alfred Dürr. According to Dürr, is the eleventh cantata composition of this period. The works contain arias and recitatives, as in contemporary opera, while earlier cantatas had concentrated on biblical text and chorale. Some works, such as , may have been composed earlier. Topic and text Trinity Sunday Bach composed for Trinity Sunday, the Sunday concluding the first half of the liturgical year. The prescribed readings for the day were from the Epistle to the Romans, "What depth of the riches of the wisdom and knowledge of God" (), and from the Gospel of John, the meeting of Jesus and Nicodemus (). In Leipzig, Bach composed two more cantatas for the occasion which focused on different aspects of the readings, , first composed for the inauguration of church and organ in Störmthal on 2 November 1723, (1725) and the chorale cantata (1726). Scholars debate if Bach performed on Trinity Sunday of 1724, which fell on 4 June, or or both. Cantata text The libretto was written by the court poet, Salomon Franck, and published in in 1715. The opening refers to Jesus' words in John 3:5: "Except a man be born of water and of the Spirit, he cannot