What follows is clear enough. Zarathustra sees a young shepherd struggling on the ground with a snake holding fast to the back of his throat. The sage, assuming that the snake must have crawled into the young man's mouth while he lay sleeping, runs to his help and pulls at the loathsome reptile with all his might, but in vain. At last, in despair, Zarathustra appeals to the young man's will. Knowing full well what a ghastly operation he is recommending, he nevertheless cries, "Bite! Bite! Its head off! Bite!" as the only possible solution of the difficulty. The young shepherd bites, and far away he spits the snake's head, whereupon he rises, "No longer shepherd, no longer man--a transfigured being, a light-surrounded being, that LAUGHED! Never on earth laughed a man as he laughed!"

Place: Chapter XLVI. The Vision and the Enigma. · ¶3903
License: Public domain · Source
The text is given as in the edition, unedited.

Open Scriptures Hebrew Bible (WLC), CC BY 4.0

What follows is clear enough. Zarathustra sees a young shepherd strugg… — Thus Spake Zarathustra