FROM ARCHYTAS, IN HIS TREATISE ON DISCIPLINES.
It is necessary that you should become scientific, either by learning from another person, or by discovering yourself the things of which you have a scientific knowledge. If, therefore, you learn from another person, that which you learn is foreign; but what you discover yourself is through yourself, and is your own. Moreover, if you investigate, discovery will be easy, and soon obtained; but if you do not know how to investigate, discovery will be to you impossible. And [right] reasoning indeed, when discovered, causes sedition to cease, and increases concord. For through this the inexhaustible desire of possessing is suppressed, and equality prevails; since by this we obtain what is just in contracts. Hence, on account of this, the poor receive from those who are able to give; and the rich give to those that are in want, both of them believing that through this they shall obtain the equal. This however will be a rule and an impediment to those that act unjustly, viz. that men who possess scientific knowledge will appease their anger, prior to the commission of an injury, being persuaded that the perpetrators of it will not be concealed when it is committed; but that those who do not possess scientific knowledge, becoming manifest in the commission of an injury, will be restrained from acting unjustly.
It appears to me that the justice which subsists among men, may be called the mother and the nurse of the other virtues. For without this a man can neither be temperate, nor brave, nor prudent. For it is the harmony and peace, in conjunction with elegance, of the whole soul. The strength however of this virtue will become more manifest, if we direct our attention to the other habits. For they have a partial utility, and which is referred to one thing; but this is referred to whole systems, and to a multitude. In the world therefore, it conducts the whole government of things, and is providence, harmony, and Dice, by the decree of a certain genus of Gods. But in a city it is justly called peace, and equitable legislation. And in a house, it is the concord between the husband and wife; the benevolence of the servant towards the master; and the anxious care of the master for the welfare of the servant. In the body likewise, which is the first and dearest thing to all animals, [so far as they are animals,] it is the health and intireness of all the parts. But in the soul, it is the wisdom, which among men subsists from science and justice. If therefore, this virtue thus disciplines and saves both the whole and the parts [of every thing] rendering things concordant and familiar with each other, how is it possible it should not be called by the decision of all men, the mother and the nurse of all things?