This is an English translation of Plato's Socratic dialogue attempting to achieve a definition of virtue that applies equally to all particular virtues and serves as a great introduction to Socratic dialogues. It contains a short introduction, notes, standard Stephanus numbers, speech numbers, and an appendix containing a unique gallery of step-by-step geometrical diagrams. It also includes illustrations, a bibliography, and a glossary. Focus Philosophical Library translations are close to and are non-interpretative of the original text, with the notes and a glossary intending to provide the reader with some sense of the terms and the concepts as they were understood by Plato's immediate audience.