We also have a certain debt toward fellow citizens, and another toward all men in common, in particular toward guests and toward men at the age of fatherhood, and another toward such as it is right that we should honor as sons or as brothers. He, therefore, who does not do what is a debt to be discharged to brothers remains a debtor for what he has not done. So, too, should we fail in what falls, at the prompting of the charitable spirit of wisdom, to human beings also at our hands, our indebtedness becomes the greater. Indeed, we also have debt in personal concerns—to use the body in a certain way, so as not to wear out the flesh of the body through love of pleasure, and on the other hand to treat the soul with a certain care, and to take forethought for the keenness of the mind, and for our speech that it be without sting and helpful and not trifling. Whenever we fail to perform what we owe, even to ourselves, the heavier does our debt become.