FROM DIOTOGENES IN HIS TREATISE CONCERNING A KINGDOM.
A king should be one who is most just; and he will be most just who pays the greatest attention to the laws. For without justice no one will be a king; and without law there can be no justice. For that which is just is just through law, which is the effective cause of justice. But a king is either animated law, or a legal ruler. And hence it follows that he will be most just and most observant of the laws. There are, however, three peculiar employments of a king; viz. to lead an army, to administer justice, and to worship the gods. He will, therefore, be able to lead an army properly, if he knows how to carry on war in a becoming manner. But he will be skilled in administering justice, and in governing all his subjects, if he has well learned the nature of justice and law. And he will worship the gods in a pious and holy manner, if he has diligently considered the nature and virtue of God; so that a good king must necessarily be a good general, judge, and priest. For these are things consequent and suitable to the transcendency and virtue of a king. For it is the province of the pilot to preserve the ship, of the charioteer to preserve the chariot, and of the physician to save the sick; but it belongs to a king and to a general to save those who are in danger in battle. For of that of which any one is the leader, he is also the provident inspector and artificer. But to be conversant with judicial affairs is, indeed, a universal thing; but is particularly the proper work of a king; who, like a god, is a leader and protector in the world. And universally, indeed, it is fit that the whole polity should be coadapted to one ruler and empire; but, especially, that things which have the relation of parts should accord with the same harmony and supreme domination. Farther still, it is the province of a king to oblige and benefit his subjects, but this not without, justice and law. And the third thing which is adapted to the dignity of a king is the worship of the gods. For it is necessary that what is most excellent should be honoured by the most excellent; and that which is the leader and ruler, by that which leads and rules. Of things, therefore, which are by nature most honourable, God is the best; but of things on the earth, and pertaining to men, a king is the most excellent. As God also is to the world, so is a king to the city [which he governs]; and as a city is to the world, so is a king to God. For a city, indeed, being coadapted from things which are many and different, imitates the coarrangement and harmony of the world; but a king who possesses an innoxious dominion, and who is himself animated law, exhibits the form of God among men.