Socrates, the ancient Greek philosopher, discussed the significance of being just in various dialogues, most notably in Plato's "Republic." One of the central themes of these discussions was the exploration of justice, ethics, and the nature of the individual's role in society. In the "Republic," Socrates engages in a dialogue with his interlocutors, including Glaucon and Adeimantus, to investigate the nature of justice and its importance.