“Listening to a witness makes you a witness.” Like propaganda, its evil twin, moral education is contagious. And to be effective, it must be contagious. Unlike propaganda, though, which tells people what they want to hear or feeds their existing fears, moral education tells people what they need to hear, even when it is painful. “Here is how you can tell the difference between false prophets and true ones,” he explained to the class more than once. “The former comfort, while the latter disturb.”

