▁brilliant ▁setting ▁of ▁" Chr iste , ▁du ▁L amm ▁Gott es ", ▁taken ▁from ▁the ▁cant ata ▁Du ▁w ah rer ▁Gott ▁und ▁David s ▁Sohn , ▁B W V ▁ 2 3 . ▁The ▁three ▁new ▁a rias ▁are ▁not ▁known ▁to ▁have ▁been ▁re used . ▁ ▁In ▁the ▁ 1 7 3 0 s , ▁Bach ▁re vised ▁the ▁St ▁John ▁Pass ion ▁again , ▁rest oring ▁the ▁original ▁opening ▁ch orus , ▁removing ▁the ▁final ▁Chor ale ▁( th us ▁ending ▁the ▁work ▁with ▁the ▁ch oral ▁Mov ement ▁No . ▁ 3 9 ), ▁and ▁removing ▁the ▁three ▁new ▁a rias . ▁He ▁also ▁exc ised ▁the ▁two ▁interpol ations ▁from ▁the ▁G ospel ▁of ▁Matthew ▁that ▁appeared ▁in ▁the ▁work , ▁probably ▁due ▁to ▁ob jections ▁by ▁the ▁ecc les iast ical ▁authorities . ▁The ▁first ▁of ▁these ▁he ▁simply ▁removed ; ▁he ▁composed ▁a ▁new ▁instrument al ▁sin f onia ▁in ▁lieu ▁of ▁the ▁second . ▁He ▁also ▁inserted ▁an ▁aria ▁to ▁replace ▁the ▁still - missing ▁Ach , ▁me in ▁S inn . ▁Ne ither ▁the ▁aria ▁nor ▁the ▁sin f onia ▁has ▁been ▁preserved . ▁Over all , ▁Bach ▁chose ▁to ▁keep ▁the ▁bib lic al ▁text , ▁and ▁inserted ▁Luther an ▁h ymn ▁vers es ▁so ▁that ▁he ▁could ▁return ▁the ▁work ▁to ▁its ▁lit urg ical ▁subst ance . ▁ ▁In ▁ 1 7 4 9 , ▁he ▁revert ed ▁more ▁or ▁less ▁to ▁the ▁original ▁of ▁ 1 7 2