Nietzsche introduces the concept of the Übermensch in contrast to the other-worldliness of Christianity: Zarathustra proclaims the Übermensch to be the meaning of the earth and admonishes his audience to ignore those who promise other-worldly hopes in order to draw them away from the earth. The turn away from the earth is prompted, he says, by a dissatisfaction with life, a dissatisfaction that causes one to create another world in which those who made one unhappy in this life are tormented. The Übermensch is not driven into other worlds away from this one.
Zarathustra declares that the Christian escape from this world also required the invention of an eternal soul which would be separate from the body and survive the body's death. Part of other-worldliness, then, was the abnegation and mortification of the body, or asceticism. Zarathustra further links the Übermensch to the body and to interpreting the soul as simply an aspect of the body.