Ich lebe, mein Herze, zu deinem Ergötzen, BWV 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!.