Zeno, the disciple of Parmenides, having attempted to kill the tyrant Demylus, and failing in his design, maintained the doctrine of Parmenides, like pure and fine gold tried in the fire, that there is nothing which a magnanimous man ought to dread but dishonor, and that there are none but children and women, or effeminate and women-hearted men, who fear pain. For, having with his own teeth bitten off his tongue, he spit it in the tyrant’s face.
AGAINST COLOTES, THE DISCIPLE AND FAVORITE OF EPICURUS. – Plutarch, The Morals, vol. 5; 32