Moreover, of perfect men there are two differences. For some of them are naturally perfect; but others are perfect according to life. And those indeed alone that are good, are naturally perfect. But these are such as possess virtue. For the virtue of the nature of every thing is a summit and perfection. Thus the virtue of the eye is the summit and perfection of the nature of the eye. But the virtue of man is the summit and perfection of the nature of man. Those also are perfect according to life, who are not only good, but happy. For felicity, indeed, is the perfection of human life. But human, life is a system of actions: and: felicity gives completion to the actions. Virtue also and fortune give completion to actions; virtue, indeed, according to use; but good fortune according to prosperity. God therefore is neither good through learning virtue from any one, nor is he happy through being attended by good fortune. For he is good by nature, and happy by nature, and always was and will be, and will never cease to be, such; since he is incorruptible, and naturally good. But man is neither happy nor good by nature, but requires discipline and providential care. And in order to become good, indeed; he requires virtue; but in order to become happy, good fortune. On this account, human felicity summarily consists of these two things, viz. of praise, and the predication of beatitude. Of praise indeed, from virtue; but of the predication of beatitude, from prosperity. It possesses virtue therefore, through a divine destiny, but prosperity through a mortal allotment. But mortal are suspended from divine concerns, and terrestrial from such as are celestial. Things subordinate, also, are suspended from such as are more excellent. And on this account, the good man who follows the Gods is happy; but he who follows mortal natures is miserable. For to him who possesses wisdom, prosperity is good and useful. It is good, indeed, through his knowledge of the use of it; but it is useful, through his co-operating with actions. It is beautiful, therefore, when prosperity is present with intellect, and when sailing as it were with a prosperous wind, actions are performed looking to virtue; just as a pilot looks to the motions of the stars. For thus, he who does this will not only follow God, but will also co-arrange human with divine good.