The prudent [i. e. the wise] man will especially become so as follows: In the first place, being naturally sagacious, possessing a good memory, and being a lover of labor, he should exercise his dianoetic power immediately from his youth in reasonings and disciplines, and in accurate theories, and adhere to genuine philosophy. But after this he should acquire knowledge and experience in what pertains to the Gods, the laws, and human lives. For there are two things from which the disposition of prudence is produced; one of which consists in obtaining a mathematical and gnostic habit; but the other, in a man perceiving by himself many theorems and things, and understanding other things through a certain different mode. For neither is he sufficient to the possession of prudence, who immediately from his youth has exercised his dianoetic power in reasonings and disciplines; nor he who being destitute of these, has heard and has been conversant with a multitude of things. But the latter will have his dianoetic power blind, through judging of particulars; and the former through always surveying universals. For as in computations the amount of the whole is obtained by the addition of the parts, thus also in things, reason is able to delineate the theory of universals; but experience has the power of forming a judgment of particulars. 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.