Now, the laws prescribe about all manner of things, aiming at the common interest of all, or of the best men, or of those who are supreme in the state (position in the state being determined by reference to personal excellence, or to some other such standard); and so in one sense we apply the term just to whatever tends to produce and preserve the happiness of the community, and the several elements of that happiness. The law bids us display courage (as not to leave our ranks, or run, or throw away our arms), and temperance (as not to commit adultery or outrage), and gentleness (as not to strike or revile our neighbours), and so on with all the other virtues and vices, enjoining acts and forbidding them, rightly when it is a good law, not so rightly when it is a hastily improvised one.

Justice, then, in this sense of the word, is complete virtue, with the addition that it is displayed towards others. On this account it is often spoken of as the chief of the virtues, and such that “neither evening nor morning star is so lovely;” and the saying has become proverbial, “Justice sums up all virtues in itself.”