The bull which is killed by Mithras is a god, apparently a chthonic god. After he is sacrificed by Mithras, the world is created out of his various organs.
The corn, the vine, and all the animals spring from them, and his soul becomes a celestial shepherd.
And Christ is a god. He is the incarnation of god in human form, and he dies as a god.
But with Nietzsche, Zarathustra is a sort of god, but he is not sacrificed, and he merely carries a corpse, the corpse of a very inferior man.
So here the god remains alive, there is no sacrifice.
Only the corpse of Nietzsche’s shadow, his own collective human side, is sacrificed, necessarily inferior because all values are concentrated on the superhuman aspect. ~Toni Wolff, Zarathustra Seminars, Page 159
Miss Wolff We spoke the week before last about the transitus which is so very different in Zarathustra than in the Mithraic or Christian myths. Here the corpse is elevated by Zarathustra into the tree, and Zarathustra lies down on the grass; but there is a kind of faint analogy with Christ on the cross.
Dr . .Jung: It might be a state of suspension.
Miss Wolff Yes, and the cross is a tree, a symbol of death and rebirth.
Dr. Jung: And there is the old tradition that the cross is made of the wood of the tree of paradise, the tree of life and knowledge, so he is
represented as hanging on the tree of life, which is naturally the same thing. The cross is the mother of the dead, the Dea Matuta. ~Zarathustra Seminars, Page 191