“Nicht sehre dich Sorge um mich” 

Die Walküre, Act III, involving Brünnhilde and Sieglinde, with the Valkyries in support.  Sieglinde no longer wishes to live, knowing that Siegmund has died at the hands of her husband Hunding in a duel.  But Sieglinde has also just learned from Brünnhilde that she bears the child of this very Siegmund, her brother, with whom she has slept.  This child, Siegfried, is reason enough for her to go on living (although she dies in childbirth between this opera and Siegfried) as Siegfried is the last hope of saving the gods and redeeming the world (As it will turn out, is the humans who redeem the world through love, but that is for another day.). 

(Note:  I have set the piece to start at 4:15 to build the drama, with the redemption leitmotif occurring at about 5:15.  You can’t miss it.  It is searing!!!  And, it is only used twice in the Ring cycle, the second time at the end of the entire Ring cycle, just after the immolation scene.)