Plato's Republic

Books five & six: "The quest for justice that has guided the dialogue in Plato's Republic from the beginning now shifts to the search for an even more encompassing quality--goodness. But what is the nature of goodness? Can human beings know it and teach it to others? How can it be manifested in the republic? To answer such questions requires a genuine lover of wisdom. How can such people be distinguished from those who simply pretend to know?"