THE first admonition, therefore, is very clear, easily obtained, and is common to all men. For it is a sane assertion, which every man will consider as evident. And it is this: Act by every one, in the same manner as if you supposed yourself to be him, and him to be you. For he will use a servant well who considers with himself, how he would think it proper to be used by him, if he indeed was the master, and himself the servant. The same thing also must be said of parents with respect to children, and of children with respect to parents; and, in short, of all men with respect to all. This admonition, however, is transcendently adapted to the alliance of brothers to each other; since nothing else is necessary for him to admit previously, who considers how he ought to conduct himself towards his brother, than promptly to assume the natural sameness of the person of each of them. This, therefore, is the first admonition, that a man should act towards his brother in the same way in which he would think it proper that his brother should act towards him.