 But probably Bach had in mind the words of "" which he used later in his chorale cantata , a paraphrase of Psalm 6 which begins in stanza 2 "" (Heal me, dear Lord, because I am sick and weak).In a complex structure, Bach combines an instrumental introduction with the chorale tune in long notes in the continuo with figuration of strings and oboes, a choral double fugue, and the presentation of the choral by a choir of trombones with the cornetto as the soprano instrument, reinforced by three recorders which play an octave higher.John Eliot Gardiner regards the unusual use of the trombones, playing the chorale tune independent of the voices, as an "anticipation of the finale to Beethoven's Fifth Symphony".