There are likewise three definite times of human life; one of prosperity; another of adversity; and a third subsisting between these. Since therefore, he is a good man who possesses and uses virtue; but he uses it according to three seasons; for he uses it either in adversity, or in prosperity, or in the time between these; and in adversity indeed he is unhappy, but in prosperity happy, and in the middle condition, he is not happy [though he is not miserable];—this being the case, it is evident that felicity is nothing else than the use of virtue in prosperity. We now speak, however, of the felicity of man. But man is not soul alone, but is likewise body. For the animal which consists of both, and that which is constituted from things of this kind is man. For though the body is naturally adapted to be the instrument of the soul, yet this as well as the soul is a part of man [so far as he is an animal.[61]] Hence of goods also, some are the goods of man, but others, of the parts of man. And the good of man, indeed, is felicity. But of the parts of man, the good of the soul is prudence, fortitude, justice, and temperance. And the good of the body is beauty, health, a good corporeal habit, and excellence of sensation. With respect to externals however, wealth, glory, honor, and nobility, are naturally adapted to be attendant on man, and to follow precedaneous goods. The less, also, are ministrant to the greater goods. Thus friendship, glory, and wealth, are ministrant both to the body and the soul; but health, strength, and excellence of sensation, are subservient to the soul; and prudence [i. e. wisdom] and justice are ministrant to the intellect of the soul. _Intellect, however, is the satellite of Deity._ For God is the most excellent, and the leader and ruler of all things. And for the sake of these, it is necessary that other goods should be present. For the general, indeed, is the leader of the army; the pilot, of the ship; God, of the world; and intellect, of soul. But prudence is the leader of the felicity pertaining to life. For prudence is nothing else than the science of the felicity which respects human life, or the science of the goods which naturally pertain to man.