Gott fähret auf mit Jauchzen, BWV 43

Gott fähret auf mit Jauchzen ("God goes up with jubilation" or "God has gone up with a shout"), BWV 43, is a church cantata by Johann Sebastian Bach. He composed it in Leipzig for the Feast of the Ascension, and led the first performance on 30 May 1726.

When Bach wrote the music, he was in his third year as Thomaskantor, the church music director of Leipzig. After two years of composing new cantatas for the occasions of the liturgical year, he began his third year by performing music by others, especially his cousin Johann Ludwig Bach. In Gott fähret auf mit Jauchzen, Bach used his cousin's cantata format, which featured a poem as text, besides quotations from the Old Testament and New Testament and closing chorale music. The quotation from the Old Testament was taken from Psalm 47 and the quotation from the New Testament from the Gospel, Mark 16. The closing chorale is formed by two stanzas from "Du Lebensfürst, Herr Jesu Christ" with text by Johann Rist.

Bach structured the cantata in eleven movements, in two parts to be performed before and after the sermon. The opening chorus and the closing chorale are sung by the choir, framing a sequence of alternating recitatives and arias. Bach scored the cantata festively for four vocal soloists, a four-part choir, three trumpets, timpani, two oboes, strings and basso continuo.