Invulnerability. Socrates says that “nothing can harm a good man either in life or death.”20 The Stoics took the same view and, as usual, enlarged on it. They describe this invulnerability as a matter of detaching yourself from externals—that is, from all things that are up to others. Instead you identify with what is up to you: your choices, your will, your understanding. No outside force can injure those things.
