The Charmides is a dialogue of Plato, in which Socrates engages a handsome and popular boy named Charmides in a conversation about the meaning of sophrosyne, a Greek word usually translated into English as "temperance," "self-control," or "restraint." When the boy is unable to satisfy him with an answer, he next turns to the boy's mentor Critias. In the dialogue, Charmides and then later Critias champion that Temperance is "doing one's own work" but Socrates derides this as vague. The definition given next of "knowing oneself" seems promising but the question is then raised if something can even have the knowledge of itself as a base. As is typical with Platonic early dialogues, the two never arrive at a completely satisfactory definition, but the discussion nevertheless raises many important points.
