', is a church cantata by Johann Sebastian Bach. He composed it for the first Sunday after Trinity and first performed it in Leipzig on 30 May 1723. The complex work in two parts of seven movements each marks the beginning of his first annual cycle of cantatas.
Bach composed the cantata at a decisive turning point in his career. After various positions in churches and courts, he assumed his post of Thomaskantor'' in Leipzig on the first Sunday after Trinity, performing this cantata. He began the ambitious project of composing a new cantata for every occasion of the liturgical year.
The work is structured in an unusual layout of 14 movements in two symmetrical parts, to be performed before and after the sermon. The unknown poet begins his text with a quotation from Psalm 26 and departs from its ideas on wealth and poverty, rich and poor, and illustrates the contrasts. The focus of the second part is on being poor or rich in spirit. Both parts are concluded by a stanza of Samuel Rodigast's hymn "".