to Siegfried’s muse of inspiration and unconscious mind, Bruennhilde, and therefore access to Wotan’s unspoken secret (his hoard of runes) which she keeps, Siegfried makes his audience (Gunther) indistinguishable from himself. Thus Siegfried transforms himself into Gunther with the Tarnhelm (#142; #143), which is the basis of the Wagnerian “Wonder,” Hagen’s Potion (#154)
(The first 7 notes or so of #158 correspond with #102, the Motif representing Mime’s inherent inability to re-forge Nothung. This suggests #158 is based on #102, suggesting Gunther’s craven nature is akin to Mime’s: both Gunther and Mime seek to pull the wool over Siegfried’s eyes to exploit him for their own betterment, and both employ a potion to this end; though Gunther does not at first contemplate Siegfried’s death, ultimately he will imitate Mime in wishing for it.)
[See #157 for #158’s dramatic context]
[[#159]] The “Oath of Atonement”: Siegfried and Gunther will atone with their blood if they dishonor this oath to each other
Though it will seem to Gunther later, thanks to Hagen’s machinations, that Siegfried dishonored Gunther by laying with Bruennhilde on the very night he abducted her to give her in marriage to Gunther, Gunther has dishonored himself by exploiting Siegfried’s unconsciousness of his true situation to grant Gunther an honor he doesn’t deserve and should not possess, access to the unspoken secret (Wotan’s hoard of forbidden knowledge he confessed to Bruennhilde) formerly concealed from man by his collective unconscious, Bruennhilde
(#159 is based on #68, and both are based in turn on #19a; through #19, #159 is kin to #17a, #20a, #50, #51, and #167; #159 is linked by association then also with #46, which is based on #19b)
[See #157 for #159’s dramatic context]
[[#160]] The blood-brothers Siegfried and Gunther drink faith to each other as they drink each other's blood
(#160’s motival links, if any, not yet ascertained)