[137] Since then it is only in the virtues of the soul that genuine and unadulterated joy is found, and since every wise man rejoices, he rejoices in himself, and not in his surrounding circumstances; for the things that are in himself are the virtues of the mind on which it is worthy for a man to provide himself; but the circumstances which surround him are either a good condition of body or an abundance of external wealth, which are not proper objects for a man to pride himself on.