17. Let us see whether perchance the precepts of philosophers have formed any, for they are wont to claim the teaching of all virtues. A certain Pythagorean virgin is spoken of in story, whom a tyrant was endeavouring to compel to reveal the secret, and lest it should be possible even in her torments for revelation to be extorted from her, she bit off her tongue and spat it in the tyrant’s face, that he who would not make an end of questioning might not have aught to question.