Love the art, poor as it may be, which thou hast learned, and be content with it; and pass through the rest of life like one who has intrusted to the gods with his whole soul all that he has, making thyself neither the tyrant nor the slave of any man.
Dost thou not see how the handicraftsmen accommodate themselves up to a certain point to those who are not skilled in their craft- nevertheless they cling to the reason (the principles) of their art and do not endure to depart from it? Is it not strange if the architect and the physician shall have more respect to the reason (the principles) of their own arts than man to his own reason, which is common to him and the gods?
It is in thy power to live free from all compulsion in the greatest tranquility of mind, even if all the world cry out against thee as much as they choose, and even if wild beasts tear in pieces the members of this kneaded matter which has grown around thee. For what hinders the mind in the midst of all this from maintaining itself in tranquility and in a just judgement of all surrounding things and in a ready use of the objects which are presented to it, so that the judgement may say to the thing which falls under its observation: This thou art in substance (reality), though in men's opinion thou mayest appear to be of a different kind; and the use shall say to that which falls under the hand: Thou art the thing that I was seeking; for to me that which presents itself is always a material for virtue both rational and political, and in a word, for the exercise of art, which belongs to man or God. For everything which happens has a relationship either to God or man, and is neither new nor difficult to handle, but usual and apt matter to work on.
What is thy art? To be good. And how is this accomplished well except by general principles, some about the nature of the universe, and others about the proper constitution of man?
There is no nature which is inferior to art, for the arts imitate the nature of things. But if this is so, that nature which is the most perfect and the most comprehensive of all natures, cannot fall short of the skill of art. Now all arts do the inferior things for the sake of the superior; therefore the universal nature does so too. And, indeed, hence is the origin of justice, and in justice the other virtues have their foundation.